Houdini 16.5 Nodes Geometry nodes

Circle geometry node

Creates open or closed arcs, circles and ellipses.

On this page

This Operation is used to create circles and ellipses. If you click and drag the mouse, it generates a circle whose radii are specified by your drag.

Clicking the mouse button on the Construction Plane without dragging places a circle with radii specified in the Parameters dialog box (default of 1) at the location of the mouse click. The radii of the default circle are aligned with the Construction Plane’s X and Y axis.

Typing Enter places a circle or ellipse whose size and position are specified in the Parameters dialog. The radii of the default circle are aligned with the Construction Plane’s X and Y axis.

If an odd aspect ratio was previously entered in the Parameters dialog, clicking and dragging produces circles which maintain that aspect ratio. This can be reset by clicking on the Reset Radii button.


If two NURBS circles that are non-rational (i.e. their X and Y radii are unequal) are skinned, more isoparms may be generated than expected. This is because non-rational NURBS circles parameterize their knots based on chord length, and the Skin SOP must consolidate the total number of knots between the two circles before skinning.

To remedy this, you may want to use a Refine SOP, and unrefine the resulting skin, or better yet, before unrefining, start with the same circle and use a Primitive SOP or Transform SOP to deform the second copy before skinning.

Placing a Circle in the viewer

To...Do this

Place the circle anywhere in the scene

  1. Click the Circle tool on the Create tab.

  2. Move the cursor into the scene view.


    You can hold Alt to detach the circle from the construction plane.

  3. Click to place the circle anywhere in the scene view.

    If you press Enter without clicking, Houdini places the circle at the origin.

Place the circle at the origin

Press ⌃ Ctrl + on the Circle tool on the shelf.


The circle can be moved once it is placed by either dragging it in the scene view or changing the values in the parameter editor.


Primitive Type

Type of geometry created.


Orientation of the circle.


These are the X and Y radii of the circle. Entering non-equal values in the xy fields results in elliptical shapes.


Location of the center of the circle.

Uniform Scale

Uniform scaling.


Sets the spline order when building a circle with a Bezier or NURBS curve type. The lowest order is 2 (linear); the highest is 11. Cubic curves are built by default.


The number of points + 1 used to describe the circle. This option applies to polygons and imperfect NURBS only. The more divisions a circle has, the smoother it looks. Using three divisions makes a triangle, four divisions a diamond, five divisions a pentagon, and so on.

For open arc types, the number of points will equal Divisions + 1, and for closed arc types, Divisions + 2. The number of points on a Bezier circle will be higher than the number of divisions specified, based on the order of the Bezier curve. The # of Divisions is ignored when building a perfect (rational) NURBS or Bezier circle.


Set the Divisions to 3 to create Triangles.

Arc Type

This menu provides you with the choices: Closed, Open Arc, Closed Arc, and Sliced Arc. The difference between these is illustrated below:

This option is disabled when building a perfect (rational) NURBS or Bezier circle. To remove a part of the rational curve later, you can use the Carve SOP.

The Closed and Closed Arc options are primarily meant for polygonal circles.

Arc Angles

When making an arc rather than a full circle, these values specify the starting and ending points of the arc in degrees. This option is disabled when building a perfect (rational) NURBS or Bezier circle.


Specifies whether the NURBS / Bezier circle should be built using rational or non-rational splines. A perfect circle has a rational topology: one that associates non-unit weights with certain vertices. Furthermore, a perfect circle has a predefined number and positions of CVs for any given spline order. An imperfect circle is non-rational and its number of CVs isn’t that strictly determined by its order.

Rational circles built this way yield a mathematically perfect shape; however, given their special definition, perfect circles are not always the ideal choice for further modeling of their points. Besides, they represent heavier geometry and may put more pressure both on the cpu and ram. In practice, you will find imperfect circles to be a better modeling choice, so it is advisable to build perfect circles only when perfect shapes are paramount.


CircleExamples Example for Circle geometry node

This is an example of the different geometry types and arc types a circle can have.

Geometry types include primitives, polygons, NURBS, and Beziers.

Arc types include closed circle, open arc, closed arc, and sliced arc.

The arc examples are animated, so playback the animation to see the arcs opening.

The following examples include this node.

DynamicLights Example for Dynamics channel node

This example demonstrates how to use the Dynamics CHOP to extract impact data from a DOPs simulation, and then modify the data to control lights in the scene.

DynamicPops Example for Dynamics channel node

This example demonstrates using the Dynamics CHOP to birth particles where an impact occurs, as well as controlling the birth rate based in impulse.

HoldLight Example for Hold channel node

This example uses the Hold CHOP in conjunction with the Dynamics CHOP to hold a light at the position of an impact from a DOPs simulation until a new impact occurs.

DensityViscosity Example for FLIP Solver dynamics node

This example demonstrates two fluids with different densities and viscosities interacting with a solid object.


This example simulates grass being pushed down by an RBD object. Fur Objects are used to represent the blades of grass and Wire Objects are used to simulate the motion. When a single Fur Object is used to represent the grass, neighbouring blades of grass will have similar motion. Additional objects with different stiffness values can be used to make the motion less uniform. When "Complex Mode" is enabled, two objects are used to represent the grass. The stiffness of each set of curves can be controlled by adjusting the "Angular Spring Constant" and "Linear Spring Constant" parameters on the corresponding Wire Objects.

FluidGlass Example for Particle Fluid Solver dynamics node

This example demonstrates how to get a smooth fluid stream to pour into a glass.

AdvectByFilaments Example for POP Advect by Filaments dynamics node

This example demonstrates how to use POP Advect by Filaments to advect particles using the velocity field of a set of vortex filaments.

AdvectByVolume Example for POP Advect by Volumes dynamics node

This example demonstrates how to use POP Advect by Volumes to advect particles using the velocity from a smoke simulation.

SphereAxisForce Example for POP Axis Force dynamics node

This example shows three different ways in which the POP Axis Force node can be used with it’s type set to sphere to control your particle simulation.

ColorVex Example for POP Color dynamics node

This example shows three different ways to use VEXpressions in your POP Color node to color your particles.

CurveForce Example for POP Curve Force dynamics node

This example demonstrates the use of the POP Curve Force node to control the flow of a particle sim AND a flip fluid sim.

SwarmBall Example for POP Interact dynamics node

This example demonstrates the use of the POP Interact node to control the distance between particles and create a ball shaped swarm.

LookatTarget Example for POP Lookat dynamics node

This interactive example demonstrates the use of the POP Lookat node. Hit play and move the green target handle around in the viewport. The cone particles will orient themselves towards the target as you move it around.

BillowyTurbine Example for Pyro Solver dynamics node

This example uses the Pyro Solver and a Smoke Object which emits billowy smoke up through a turbine (an RBD Object). The blades of the turbine are created procedurally using Copy, Circle, and Align SOPs.

Chainlinks Example for RBD Pin Constraint dynamics node

In this chain simulation, the individual chain links react to one another in an RBD sim.


This example highlights several features:

  • Geometry area lights

  • Attenuation ramp controls

  • Surface model specular layers

The example consists of a geometry light based on a wireframe of nurbs curves. The attenuation on the light uses colored keys, allowing for different light colors to be produced at different distances from the light. The ground plane shader uses a surface model with two specular components - one wide component and another narrower glossy component to give a multi-layered appearance.

PathPathcvWorm Example for Path object node

This example shows a use for the Path and Pathcv nodes. These Path CV’s can be rotated greater than 360. They also have an initial twist function under the controls tab. This can be useful for creating a quick spine.

Volume Rendering - File Referenced Smoke Example for Mantra render node

Volume rendering is a rendering approach that allows high-quality, integrated rendering of volumetric effects like smoke, clouds, spray, and fire.

Volume rendering is suitable for rendering many types of volumetric effects. Scenes that are particularly suited to rendering with mantra volumes include:

  • Detailed "hero" clouds, smoke, or fire

  • Fields of instanced clouds, smoke, or fire

Scenes where volume rendering may not be quite so applicable include:

  • Scenes with a single uniform fog

In this particular example, a bgeo file (1 frame only) was exported from a fluid simulation of smoke and is now referenced using the File SOP. A material using VEX Volume Cloud is assigned to this volumetric data at the top level of the Volume Object. To see this scene in shaded mode, ensure that HOUDINI_OGL_ENABLE_SHADERS is set to 1 in the environment variables.

Controlling Quality/Performance

Volume rendering uses ray marching to step through volumes. Ray marching generates shading points in the volume by uniformly stepping along rays for each pixel in the image. There are two ways to change the quality and speed of the volume ray marching:

  1. The samples parameter on the Sampling tab of the mantra ROP. More pixel samples will produce more ray marches within that pixel leading to higher quality. Using more pixel samples will also improve antialiasing and motion blur quality for the volume.

  2. The volumesteprate parameter on the Sampling tab of the mantra ROP. A larger volume step rate will produce more samples in the volume interior, improving quality and decreasing performance. A separate shadow step rate can be used for shadows.

Which parameter you should change will depend on your quality requirements for pixel antialiasing. In general, it is better to decrease the volume step size rather than increase the pixel samples because a smaller volume step size will lead to more accurate renders.

This render uses 2×2 samples and volume step rate of 1. Notice the detail in the shadows.

This render uses the same scene with 4×4 samples and a volume step rate of 0.25. The fine detail in the shadow has been lost and the volume is somewhat more transparent. The quality level is approximately the same.

Down Hill Lava Flow Example for Material shader node

In this file we create a downhill lava flow with crust gathering and hardening at the base of the slope. All of the animation is achieved through the shader itself, and all of the geometry is completely static.


Most of the parameters for the lava material are overridden by point attributes created in the surface nodes.

AddItUp Example for Add geometry node

This network demonstrates the many uses of the Add SOP to build and manipulate geometry:

  • It is used to create points in space which can then be used to create polygons using designated patterns. These polygons can be open or closed. Futhermore, each point can be animated through expressions or keyframes.

  • It is used to both create points and grab points from other primitives. These points may be used in polygon creation.

  • The Add SOP may be utilized to create a polygon using points extracted from another polygonal object. A Group SOP allows for the creation of the point group that will be referenced by the Add SOP.

  • The Add SOP is used to create a polygon from a group of animated Null objects. An Object Merge SOP references the null points in SOPs which are then fed into an Add SOP for polygon generation. A Fit SOP, in turn, is used to create an interpolated spline from the referenced null points. The result is an animted spline.

  • The Add SOP is used to generate points without creating any primitives. Also, points from other objects can be extracted through the Add SOP.

  • Finally the Add SOP can additionally be used to procedurally create rows and columns.

CarveExtractCurve Example for Carve geometry node

This network is a demonstration of how the Carve SOP can be used to extract various elements of the surface geometry.

Depending on the type of geometry, the Carve SOP may be used to extract points from polygonal objects or curves from NURBS surfaces.

Furthermore, the Carve SOP uses the surface U and V information to extract the various elements, and by animating the U and V values we can create various effects as the points and curves move on the geometry surface.

CircleExamples Example for Circle geometry node

This is an example of the different geometry types and arc types a circle can have.

Geometry types include primitives, polygons, NURBS, and Beziers.

Arc types include closed circle, open arc, closed arc, and sliced arc.

The arc examples are animated, so playback the animation to see the arcs opening.

ConvToTrimSurface Example for Convert geometry node

This example shows how to create a trimmed NURBS or Bezier surface using the Convert SOP.

There are four examples contained that compare how a trimmed surface handles a texture.

  • Grid Surface a simple texture map on a grid.

  • Trimmed Circle Using the Trim SOP the conventional way of creating a trimmed surface using a Project SOP and a Trim SOP.

  • Trimmed Circle Using the Convert SOP creates a trimmed surface using a Convert SOP.

  • NURBS Surface Using the Convert SOP shows how a texture is parametrized over a surface that is not trimmed.

To get a better sense of the parameterization of the texture, turn on points and toggle between wireframe and shaded modes.


This example demonstrates how to perform boolean operations using the Cookie SOP.

In this instance, the points are consolidated using a Facet SOP and a Divide SOP is used to create a smooth surface for the Cookie SOP to operate on.


This example creates a boolean operation using the Cookie SOP.

A star geometry is created and used to subtract the shape from the sphere geometry.

CopyAttributes Example for Copy Stamp geometry node

The Copy SOP can be used for more than copying geometry. In this example, the Copy SOP is used to transfer color attributes from the template geometry (or point) to the copied geometry.

A polygonal sphere with color infomation is used as the source geometry. A point with a color attribute (Cd) is extracted from the sphere and used as a template by the Copy SOP. Then the Copy SOP transfers the color infomation to a copied polygonal circle.

StampStars Example for Copy Stamp geometry node

This example demonstrates the power of the Copy SOP’s Stamp operation.

Here, a Copy SOP is used to copy a circle onto the points of a sphere. The Stamp operation then applies various modifications to those copies based on division, scale, color, and extrusion. This results in the generation of a randomized variety of "stars".

Starting with a simple circle, a large number of variations are created using in the copies through the use of Stamping with expressions.

CreepBlob Example for Creep geometry node

This example shows how to creep metaballs on a surface. In this case, the surface is a contorted tube and the metaballs look like a "blob" being pushed through the tract.

A tube is created and used as the creep surface. A circle is created by carving a profile out from that same tube. The circle is then animated with a Creep SOP down the length of the tube.

Metaballs are attached to the points on that carved circle to create the "blob".

CreepParticleTubeA Example for Creep geometry node

This example shows two different ways in which particles can be crept on a surface. In this case, the surface is a contorted tube.

One version shows how particles are crept inside the surface, the other shows how particles are crept outside the surface. This is done by changing the z scale in the Creep SOP, which offsets the particles perpendicular to the surface.

The particles are birthed from a circle that is carved from the tube geometry.

DeleteFan Example for Delete geometry node

The Delete SOP can be used to delete primitives through various methods.

Primitives can be deleted using a pattern range to create interesting objects, such as the fan in this example.

EdgeCollapseBasic Example for Edge Collapse geometry node

The Edge Collapse SOP simply allows the deletion of edges, as shown in this example. Point numbers are rearranged to accommodate the missing edge.

EdgeFlipBasic Example for Edge Flip geometry node

This example demonstrates how you can use the EdgeFlip SOP to flip a selected edge on a surface.

An edge is created on a polygon using the Polysplit SOP, then rotated using the EdgeFlip SOP.

FurBallWorkflow Example for Fur geometry node

This example demonstrates how the Fur SOP and Mantra Fur Procedural can be applied to an animated skin geometry. CVEX shaders are used to apply a custom look to the hairs based upon attributes assigned to the geometry.

HoleBasic Example for Hole geometry node

This file demonstrates the Hole SOP.

There are four examples given of the Hole SOP, how to add holes to a surface, or remove them.


This example demonstrates how to have multiple shading layers with different uv sets using the Layer SOP and the VEX Layered Surface SHOP.

LSystemMaster Example for L-System geometry node

The LSystems SOP allows for the definition of complex shapes through the use of iteration. It uses a mathematical language in which an initial string of characters is evaluated repeatedly, and the results are used to generate geometry. The result of each evaluation becomes the basis for the next iteration of geometry, giving the illusion of growth.

The example networks located in this demonstration should be enough to get you started writing custom LSystem rules.

However, anyone seriously interested in creating LSystems should obtain the book:

The Algorithmic Beauty of Plants, Przemyslaw Prusinkiewicz and Aristid Lindenmayer

For a full list of LSystem commands, see the Houdini documentation.

LsystemBuilding Example for L-System geometry node

This example demonstrates how to use the L-System SOP to generate buildings with windows.

ParticleAttractor Example for Particle geometry node

This example file demonstrates using the Metaball and Force SOPs to affect particles generated by the Particle SOP.

Particles are birthed from the origin and shot towards a still metaball. The metaball has a Force SOP applied to it causing the particles, upon reaching the metaball, to spread away from it out into space.

ParticleTube Example for Particle geometry node

The Particle SOP enables the creation of particles at the SOP level and allows those particles to directly interact with geometry. Furthermore, these particles are in turn treated as point geometry.

In this example, particles are both crept along and collided with a collision tube object. It is possible to also manipulate and control particles in SOPs through the adjustment of point normals (including those of the particles).

AimPointNormals Example for Point geometry node

This is an example of how to use the Point SOP to orient point normals along a path. This allows for control over the orientation of geometry when copied onto points.

Points are extracted along a spiral on a per frame basis using an expression in the Carve SOP. A cone is copied to these points sequentially and results in an animation along the path.

BridgeCurvesandPrims Example for Poly Bridge geometry node

This contains two examples of how to use the Bridge SOP.

The first example illustrates how to use the Bridge SOP on projected and trimmed curves. The second illustrates how to use the Bridge SOP on two carved primitives.

Press Play to see an animated version of the Bridge over Two Carves.

FlagProfiles Example for Profile geometry node

This example shows how to use the Project SOP to create a profile on a surface.

The Profile SOP is then used to extract the profile from the surface or remap the profile on it. It also shows how the profile will animate with the surface or independent of it.

ProjectCurve Example for Project geometry node

This example shows the Project SOP projecting a Circle onto a Tube geometry.

By projecting along a vector the Circle profile is attached to the tube. With the use of a Trim SOP the profile can then be used to cut holes in the Tube.

RayWrap Example for Ray geometry node

The Ray SOP projects one object over the surface contours of another.

It does so by calculating the collisions of the projected object’s normals with the surface geometry of the collided object.

In this example, a Grid is wrapped over the surface of a deformed Sphere using the Ray SOP.

A Facet SOP is used to correct the normals of the wrapped Grid after it is deformed over the surface.

BasicRest Example for Rest Position geometry node

The Rest Position SOP creates an attribute based on the surface normals that allows a shader to stick to a deforming surface.

All primitives support the rest attribute, but, in the case of quadric primitives (circle, tube, sphere and metaball primitives), the rest position is only translational. This means that rest normals will not work correctly for these primitive types either.

Use the Rest Position SOP only when you are deforming your geometry and you are assigning volumetric or solid materials/patterns in your shader.

Rest normals are required if feathering is used on polygons and meshes in Mantra. NURBs/Beziers will use the rest position to compute the correct resting normals.

It will be necessary to render the setup in order to see the effect.

BasicRevolve Example for Revolve geometry node

This example demonstrates the Revolve SOP’s ability to create geometry by spinning curves and surfaces around any described axis. Simple objects, such as a torus and a vase, are generated by the Revolve SOP and user-defined inputs.

This file also shows off how different geometry types react to different Revolve SOP parameter changes.

DoorWithPolkaDots Example for Scatter geometry node

This example demonstrates how you can use the Scatter SOP to scatter points that stay consistent through topology changes like remodelling the input geometry or breaking it. It does this by using the option to scatter in texture space.

SpottedSoccerBalls Example for Scatter geometry node

This example demonstrates how you can use the Scatter SOP to scatter points that stay consistent when separate pieces are added or removed. It does this by using the option to use custom random seeds for each primitive.

SkinBasic Example for Skin geometry node

This is a demonstration of using the Skin SOP to create complex forms by creating surfaces between one or two input geometries.

It also demonstrates how the Skin SOP can interpret between different geometry types and varying point numbers.

SweepBasic Example for Sweep geometry node

This example demonstrates how the Sweep SOP copies geometry onto the points of a curve.

The Sweep SOP is unique in that it automatically places the copied geometry perpendicular to the backbone it is copied to. Variations such as the Cross Section’s scale can be adjusted using expressions.

SweepCurve Example for Sweep geometry node

This network contains an example of the Sweep SOP. A NURBS curve and NURBS circles are used as the backbone and the cross section geometries of the sweep operation respectively.

By controling the scaling of the cross section geometry in the Sweep SOP various effects can be acheived. Finally, a Skin SOP completes the form by using the swept geometry as a kind of skeleton.

SweepDome Example for Sweep geometry node

In this example the Sweep SOP a grid is used as the backbone of a sweep operation with arcs (created by a Circle SOP) as the hull (cross sections) of the sweep object.

The final sweep object is then skinned with a Skin SOP to create the dome geometry.

WigglyWorm Example for Sweep geometry node

This network demonstrates how the Sweep SOP can be used to construct geometry that is easily deformable. The Sweep SOP requires a backbone and cross section geometry.

Through a sin() function an expression is created to animate the backbone for a slithering effect. Then the circles are copied at every point on the backbone to create the skeleton of the worm. Finally, a simple skin operation completes the worm body.

Chainmail Example for Triangulate 2D geometry node

This example demonstrates advanced use of the new Triangulate2D SOP to create chainmail links.

volumeresample Example for Volume Resample geometry node

This example shows how to use the Volume Resample SOP to increase and decrease the resolution of a volume. It also shows how the different sampling options affect the quality of the resulting volume.

Wireblend Example for Wire Blend geometry node

The Wire Blend SOP is used to blend curves from input geometry. In this case, three input morph targets are used by the Wire Blend SOP with the Differencing and option checked. The blend values of the input morphs are keyframed for specific effects. Play the animation to see the results.

RaytraceVopShader Example for Ray Trace VOP node

This example demonstrates a simple ray traced shader using a vop vex network. To modify the shader properties, create a properties shader in the material and connect it to the output shaders node. You can then add rendering parameters to the properties node. For example to control the number of reflection bounces, you would add the reflect limit parameter.

Geometry nodes

  • Adaptive Prune

    Removes elements while trying to maintain the overall appearance.

  • Add

    Creates Points or Polygons, or adds points/polys to an input.

  • Agent

    Creates agent primitives.

  • Agent Clip

    Adds new clips to agent primitives.

  • Agent Clip Properties

    Defines how agents' animation clips should be played back.

  • Agent Clip Transition Graph

    Creates geometry describing possible transitions between animation clips.

  • Agent Collision Layer

    Creates a new agent layer that is suitable for collision detection.

  • Agent Configure Joints

    Creates point attributes that specify the rotation limits of an agent’s joints.

  • Agent Constraint Network

    Builds a constraint network to hold an agent’s limbs together.

  • Agent Edit

    Edits properties of agent primitives.

  • Agent Layer

    Adds a new layer to agent primitives.

  • Agent Look At

    Adjusts the head of an agent to look at a specific object or position.

  • Agent Look At

    Adjusts the head of an agent to look at a specific object or position.

  • Agent Prep

    Adds various common point attributes to agents for use by other crowd nodes.

  • Agent Prep

    Adds various common point attributes to agents for use by other crowd nodes.

  • Agent Proxy

    Provides simple proxy geometry for an agent.

  • Agent Relationship

    Creates parent-child relationships between agents.

  • Agent Terrain Adaptation

    Adapts agents' legs to conform to terrain and prevent the feet from sliding.

  • Agent Transform Group

    Adds new transform groups to agent primitives.

  • Alembic

    Loads the geometry from an Alembic scene archive (.abc) file into a geometry network.

  • Alembic Group

    Creates a geometry group for Alembic primitives.

  • Alembic Primitive

    Modifies intrinsic properties of Alembic primitives.

  • Alembic ROP output driver

  • Align

    Aligns a group of primitives to each other or to an auxiliary input.

  • Assemble

    Cleans up a series of break operations and creates the resulting pieces.

  • Attribute Blur

    Blurs out (or "relaxes") points in a mesh or a point cloud.

  • Attribute Cast

    Changes the size/precision Houdini uses to store an attribute.

  • Attribute Composite

    Composites vertex, point, primitive, and/or detail attributes between two or more selections.

  • Attribute Copy

    Copies attributes between groups of vertices, points, or primitives.

  • Attribute Create

    Adds or edits user defined attributes.

  • Attribute Delete

    Deletes point and primitive attributes.

  • Attribute Expression

    Allows simple VEX expressions to modify attributes.

  • Attribute Fade

    Fades a point attribute in and out over time.

  • Attribute Interpolate

    Interpolates attributes within primitives or based on explicit weights.

  • Attribute Mirror

    Copies and flips attributes from one side of a plane to another.

  • Attribute Promote

    Promotes or demotes attributes from one geometry level to another.

  • Attribute Randomize

    Generates random attribute values of various distributions.

  • Attribute Rename

    Renames or deletes point and primitive attributes.

  • Attribute Reorient

    Modifies point attributes based on differences between two models.

  • Attribute String Edit

    Edits string attribute values.

  • Attribute Swap

    Copies, moves, or swaps the contents of attributes.

  • Attribute Transfer

    Transfers vertex, point, primitive, and/or detail attributes between two models.

  • Attribute Transfer By UV

    Transfers attributes between two geometries based on UV proximity.

  • Attribute VOP

    Runs a VOP network to modify geometry attributes.

  • Attribute Wrangle

    Runs a VEX snippet to modify attribute values.

  • Attribute from Map

    Samples texture map information to a point attribute.

  • Attribute from Volume

    Copies information from a volume onto the point attributes of another piece of geometry, with optional remapping.

  • Bake ODE

    Converts primitives for ODE and Bullet solvers.

  • Bake Volume

    Computes lighting values within volume primitives

  • Basis

    Provides operations for moving knots within the parametric space of a NURBS curve or surface.

  • Bend

    Applies deformations such as bend, taper, squash/stretch, and twist.

  • Blast

    Deletes primitives, points, edges or breakpoints.

  • Blend Shapes

    Computes a 3D metamorphosis between shapes with the same topology.

  • Block Begin

    The start of a looping block.

  • Block Begin Compile

    The start of a compile block.

  • Block End

    The end/output of a looping block.

  • Block End Compile

    The end/output of a compile block.

  • Bone Capture

    Supports Bone Deform by assigning capture weights to bones.

  • Bone Capture Biharmonic

    Supports Deform by assigning capture weights to points based on biharmonic functions on tetrahedral meshes.

  • Bone Capture Lines

    Supports Bone Capture Biharmonic by creating lines from bones with suitable attributes.

  • Bone Capture Proximity

    Supports Bone Deform by assigning capture weights to points based on distance to bones.

  • Bone Deform

    Uses capture attributes created from bones to deform geometry according to their movement.

  • Bone Link

    Creates default geometry for Bone objects.

  • Boolean

    Combines two polygonal objects with boolean operators, or finds the intersection lines between two polygonal objects.

  • Bound

    Creates an axis-aligned bounding box or sphere for the input geometry.

  • Box

    Creates a cube or six-sided rectangular box.

  • Break

    Breaks the input geometry using the specified cutting shape.

  • Bulge

    Deforms the points in the first input using one or more magnets from the second input.

  • Cache

    Records and caches its input geometry for faster playback.

  • Cap

    Closes open areas with flat or rounded coverings.

  • Capture Attribute Pack

    Converts array attributes into a single index-pair capture attribute.

  • Capture Attribute Unpack

    Converts a single index-pair capture attribute into per-point and detail array attributes.

  • Capture Correct

    Adjusts capture regions and capture weights.

  • Capture Layer Paint

    Lets you paint capture attributes directly onto geometry.

  • Capture Mirror

    Copies capture attributes from one half of a symmetric model to the other.

  • Capture Override

    Overrides the capture weights on individual points.

  • Capture Region

    Supports Capture and Deform operation by creating a volume within which points are captured to a bone.

  • Carve

    Slices, cuts or extracts points or cross-sections from a primitive.

  • Channel

    Reads sample data from a chop and converts it into point positions and point attributes.

  • Circle

    Creates open or closed arcs, circles and ellipses.

  • Clay

    Lets you deform NURBS faces and NURBS surfaces by pulling points that lie directly on them.

  • Clean

    Helps clean up dirty models.

  • Clip

    Removes or groups geometry on one side of a plane, or creases geometry along a plane.

  • Cloth Capture

    Captures low-res simulated cloth.

  • Cloth Deform

    Deforms geometry captured by the Cloth Capture SOP.

  • Cloud

    Creates a volume representation of source geometry.

  • Cloud Light

    Fills a volume with a diffuse light.

  • Cloud Noise

    Applies a cloud like noise to a Fog volume.

  • Cluster

    Low-level machinery to cluster points based on their positions (or any vector attribute).

  • Cluster Points

    Higher-level node to cluster points based on their positions (or any vector attribute).

  • Collision Source

    Creates geometry and VDB volumes for use with DOPs collisions.

  • Color

    Adds color attributes to geometry.

  • Comb

    Adjust surface point normals by painting.

  • Connect Adjacent Pieces

    Creates lines between nearby pieces.

  • Connectivity

    Creates an attribute with a unique value for each set of connected primitives or points.

  • Control

    Creates simple geometry for use as control shapes.

  • Convert

    Converts geometry from one geometry type to another.

  • Convert HeightField

    Converts a 2D height field to a 3D VDB volume, polygon surface, or polygon soup surface.

  • Convert Line

    Converts the input geometry into line segments.

  • Convert Meta

    Polygonizes metaball geometry.

  • Convert Tets

    Generates the oriented surface of a tetrahedron mesh.

  • Convert VDB

    Converts sparse volumes.

  • Convert VDB Points

    Converts a Point Cloud into a VDB Points Primitive, or vice versa.

  • Convert Volume

    Converts the iso-surface of a volume into a polygonal surface.

  • Copy Stamp

    Creates multiple copies of the input geometry, or copies the geometry onto the points of the second input.

  • Copy and Transform

    Copies geometry and applies transformations to the copies.

  • Copy to Points

    Copies the geometry in the first input onto the points of the second input.

  • Crease

    Manually adds or removes a creaseweight attribute to/from polygon edges, for use with the Subdivide SOP.

  • Creep

    Deforms and animates a piece of geometry across a surface.

  • Crowd Source

    Populates a crowd of agent primitives.

  • Crowd Source

    Creates crowd agents to be used with the crowd solver.

  • Curve

    Creates polygonal, NURBS, or Bezier curves.

  • Curveclay

    Deforms a spline surface by reshaping a curve on the surface.

  • Curvesect

    Finds the intersections (or points of minimum distance) between two or more curves or faces.

  • DOP I/O

    Imports fields from DOP simulations, saves them to disk, and loads them back again.

  • DOP Import Fields

    Imports scalar and vector fields from a DOP simulation.

  • DOP Import Records

    Imports option and record data from DOP simulations into points with point attributes.

  • DOP Network

  • Debris Source

    Generates point emission sources for debris from separating fractured rigid body objects.

  • Deformation Wrangle

    Runs a VEX snippet to deform geometry.

  • Delete

    Deletes input geometry by group, entity number, bounding volume, primitive/point/edge normals, and/or degeneracy.

  • Delete Overlapping Polygons

    Removes polygons that overlap.

  • DeltaMush

    Smooths out (or "relaxes") point deformations.

  • Dissolve

    Deletes edges from the input polygonal geometry merging polygons with shared edges.

  • Dissolve

    Deletes points, primitives, and edges from the input geometry and repairs any holes left behind.

  • Divide

    Divides, smooths, and triangulates polygons.

  • Dop Import

    Imports and transforms geometry based on information extracted from a DOP simulation.

  • Draw Curve

    Creates a curve based on user input in the viewport.

  • Draw Guides

  • Each

    Culls the input geometry according to the specifications of the For Each SOP.

  • Edge Collapse

    Collapses edges and faces to their centerpoints.

  • Edge Cusp

    Sharpens edges by uniquing their points and recomputing point normals.

  • Edge Divide

    Inserts points on the edges of polygons and optionally connects them.

  • Edge Flip

    Flips the direction of polygon edges.

  • Edge Transport

    Copies and optionally modifies attribute values along edges networks and curves.

  • Edit

    Edits points, edges, or faces interactively.

  • Ends

    Closes, opens, or clamps end points.

  • Enumerate

    Sets an attribute on selected points or primitives to sequential numbers.

  • Error

    Generates a message, warning, or error, which can show up on a parent asset.

  • Exploded View

    Pushes geometry out from the center to create an exploded view.

  • Extrude

    Extrudes geometry along a normal.

  • Extrude Volume

    Extrudes surface geometry into a volume.

  • Facet

    Controls the smoothness of faceting of a surface.

  • Filament Advect

    Evolves polygonal curves as vortex filaments.

  • File

    Reads, writes, or caches geometry on disk.

  • File Cache

    Writes and reads geometry sequences to disk.

  • File Merge

    Reads and collates data from disk.

  • Fillet

    Creates smooth bridging geometry between two curves or surfaces.

  • Filmbox FBX ROP output driver

  • Find Shortest Path

    Finds the shortest paths from start points to end points, following the edges of a surface.

  • Fit

    Fits a spline curve to points, or a spline surface to a mesh of points.

  • Fluid Compress

    Compresses the output of fluid simulations to decrease size on disk

  • Fluid Source

    Creates one or multiple volumes out of geometry to be used in a fluid simulation

  • Font

    Creates 3D text from Type 1, TrueType and OpenType fonts.

  • Force

    Uses a metaball to attract or repel points or springs.

  • Fractal

    Creates jagged mountain-like divisions of the input geometry.

  • Fur

    Creates a set of hair-like curves across a surface.

  • Fuse

    Merges or splits (uniques) points.

  • Geometry ROP output driver

  • Glue Cluster

    Adds strength to a glue constraint network according to cluster values.

  • Grain Source

    Generates particles to be used as sources in a particle-based grain simulation.

  • Grid

    Creates planar geometry.

  • Groom Blend

    Blends the guides and skin of two grooms.

  • Groom Fetch

    Fetches groom data from grooming objects.

  • Groom Pack

    Packs the components of a groom into a set of named Packed Primitives for the purpose of writing it to disk.

  • Groom Switch

    Switches between all components of two groom streams.

  • Groom Unpack

    Unpacks the components of a groom from a packed groom.

  • Group

    Generates groups of points, primitives, edges, or vertices according to various criteria.

  • Group Combine

    Combines point groups, primitive groups, or edge groups according to boolean operations.

  • Group Copy

    Copies groups between two pieces of geometry, based on point/primitive numbers.

  • Group Delete

    Deletes groups of points, primitives, edges, or vertices according to patterns.

  • Group Expression

    Runs VEX expressions to modify group membership.

  • Group Paint

    Sets group membership interactively by painting.

  • Group Promote

    Converts point, primitive, edge, or vertex groups into point, primitive, edge, or vertex groups.

  • Group Range

    Groups points and primitives by ranges.

  • Group Rename

    Renames groups according to patterns.

  • Group Transfer

    Transfers groups between two pieces of geometry, based on proximity.

  • Guide Advect

    Advects guide points through a velocity volume.

  • Guide Collide With VDB

    Resolves collisions of guide curves with VDB signed distance fields.

  • Guide Deform

    Deforms geometry with an animated skin and optionally guide curves.

  • Guide Groom

    Allows intuitive manipulation of guide curves in the viewport.

  • Guide Group

    Creates standard primitive groups used by grooming tools.

  • Guide Initialize

    Quickly give hair guides some initial direction.

  • Guide Mask

    Creates masking attributes for other grooming operations.

  • Guide Partition

    Creates and prepares parting lines for use with hair generation.

  • Guide Skin Attribute Lookup

    Looks up skin geometry attributes under the root point of guide curves.

  • Guide Tangent Space

    Constructs a coherent tangent space along a curve.

  • Guide Transfer

    Transfer hair guides between geometries.

  • Hair Clump

    Clumps guide curves together.

  • Hair Generate

    Generates hair on a surface or from points.

  • Hair Growth Field

    Generates a velocity field based on stroke primitives.

  • HeightField

    Generates an initial heightfield volume for use with terrain tools.

  • HeightField Blur

    Blurs a terrain height field or mask.

  • HeightField Clip

    Limits height values to a certain minimum and/or maximum.

  • HeightField Copy Layer

    Creates a copy of a height field or mask.

  • HeightField Crop

    Extracts a square of a certain width/length from a larger height volume, or resizes/moves the boundaries of the height field.

  • HeightField Distort

    Advects the input volume through a noise pattern to break up hard edges and add variety.

  • HeightField Draw Mask

    Lets you draw shapes to create a mask for height field tools.

  • HeightField Erode

    Calculates thermal and hydraulic erosion over time (frames) to create more realistic terrain.

  • HeightField File

    Imports a 2D image map from a file or compositing node into a height field or mask.

  • HeightField Isolate Layer

    Copies another layer over the mask layer, and optionally flattens the height field.

  • HeightField Layer

    Composites together two height fields.

  • HeightField Layer Clear

    Sets all values in a heightfield layer to 0.

  • HeightField Layer Property

    Sets the border voxel policy on a height field volume.

  • HeightField Mask by Feature

    Creates a mask based on different features of the height layer.

  • HeightField Mask by Object

    Creates a mask based some other geometry.

  • HeightField Noise

    Adds vertical noise to a height field, creating peaks and valleys.

  • HeightField Output

    Exports height and/or mask layers to disk as an image.

  • HeightField Paint

    Lets you paint values into a height or mask field using strokes.

  • HeightField Patch

    Patches features from one heightfield to another.

  • HeightField Pattern

    Adds displacement in the form of a ramps, steps, stripes, Voronoi cells, or other patterns.

  • HeightField Project

    Projects 3D geometry into a height field.

  • HeightField Quick Shade

    Applies a material that lets you plug in textures for different layers.

  • HeightField Remap

    Remaps the values in a height field or mask layer.

  • HeightField Resample

    Changes the resolution of a height field.

  • HeightField Scatter

    Scatters points across the surface of a height field.

  • HeightField Slump

    Simulates loose material sliding down inclines and piling at the bottom.

  • HeightField Terrace

    Creates stepped plains from slopes in the terrain.

  • HeightField Tile Splice

    Stitches height field tiles back together.

  • HeightField Tile Split

    Splits a height field volume into rows and columns.

  • HeightField Transform

    Height field specific scales and offsets.

  • HeightField Visualize

    Visualizes elevations using a custom ramp material, and mask layers using tint colors.

  • Hole

    Makes holes in surfaces.

  • Inflate

    Deforms the points in the first input to make room for the inflation tool.

  • Instance

    Instances Geometry on Points.

  • Intersection Analysis

    Creates points with attributes at intersections between a triangle and/or curve mesh with itself, or with an optional second set of triangles and/or curves.

  • Intersection Stitch

    Composes triangle surfaces and curves together into a single connected mesh.

  • Invoke Compiled Block

    Processes its inputs using the operation of a referenced compiled block.

  • IsoOffset

    Builds an offset surface from geometry.

  • IsoSurface

    Generates an isometric surface from an implicit function.

  • Join

    The Join op connects a sequence of faces or surfaces into a single primitive that inherits their attributes.

  • Knife

    Divides, deletes, or groups geometry based on an interactively drawn line.

  • L-System

    Creates fractal geometry from the recursive application of simple rules.

  • Lattice

    Deforms geometry based on how you reshape control geometry.

  • Lidar Import

    Reads a lidar file and imports a point cloud from its data.

  • Line

    Creates polygon or NURBS lines from a position, direction, and distance.

  • MDD

    Animates points using an MDD file.

  • Magnet

    Deforms geometry by using another piece of geometry to attract or repel points.

  • Match Axis

    Aligns the input geometry to a specific axis.

  • Match Size

    Resizes and recenters the geometry according to reference geometry.

  • Match Topology

    Reorders the primitive and point numbers of the input geometry to match some reference geometry.

  • Material

    Assigns one or more materials to geometry.

  • Measure

    Measures volume, area, and perimeter of polygons and puts the results in attributes.

  • Merge

    Merges geometry from its inputs.

  • MetaGroups

    Defines groupings of metaballs so that separate groupings are treated as separate surfaces when merged.

  • Metaball

    Creates metaballs and meta-superquadric surfaces.

  • Mirror

    Duplicates and mirrors geometry across a mirror plane.

  • Mountain

    Displaces points along their normals based on fractal noise.

  • Mountain

    Displaces points along their normals based on fractal noise.

  • Muscle Capture

    Supports Muscle Deform by assigning capture weights to points based on distance away from given primitives

  • Muscle Deform

    Deforms a surface mesh representing skin to envelop or drape over geometry representing muscles

  • Name

    Creates a "naming" attribute on points or primitives allowing you to refer to them easily, similar to groups.

  • Normal

    Computes surface normal attribute.

  • Null

    Does nothing.

  • Object Merge

    Merges geometry from multiple sources and allows you to define the manner in which they are grouped together and transformed.

  • Object_musclerig@musclerigstrokebuilder

  • Object_riggedmuscle@musclestrokebuilder

    Assists the creation of a Muscle or Muscle Rig by allowing you to draw a stroke on a projection surface.

  • Ocean Evaluate

    Deforms input geometry based on ocean "spectrum" volumes.

  • Ocean Evaluate

    Deforms input geometry based on ocean "spectrum" volumes.

  • Ocean Foam

    Generates particle-based foam

  • Ocean Source

    Generates particles and volumes from ocean "spectrum" volumes for use in simulations

  • Ocean Source

    Generates particles and volumes from ocean "spectrum" volumes for use in simulations

  • Ocean Spectrum

    Generates volumes containing information for simulating ocean waves.

  • Ocean Waves

    Instances individual waveforms onto input points and generated points.

  • OpenCL

    Executes an OpenCL kernel on geometry.

  • Output

    Marks the output of a sub-network.

  • Pack

    Packs geometry into an embedded primitive.

  • Pack Points

    Packs points into a tiled grid of packed primitives.

  • Packed Disk Edit

    Editing Packed Disk Primitives.

  • Packed Edit

    Editing Packed Primitives.

  • Paint

    Lets you paint color or other attributes on geometry.

  • Paint Color Volume

    Creates a color volume based on drawn curve

  • Paint Fog Volume

    Creates a fog volume based on drawn curve

  • Paint SDF Volume

    Creates an SDF volume based on drawn curve

  • Particle

    Creates simple particle simulations without requiring an entire particle network.

  • Particle Fluid Surface

    Generates a surface around the particles from a particle fluid simulation.

  • Particle Fluid Tank

    Creates a set of regular points filling a tank.

  • Partition

    Places points and primitives into groups based on a user-supplied rule.

  • Peak

    Moves primitives, points, edges or breakpoints along their normals.

  • Platonic Solids

    Creates platonic solids of different types.

  • Point

    Manually adds or edits point attributes.

  • Point Cloud Iso

    Constructs an iso surface from its input points.

  • Point Deform

    Deforms geometry on an arbitrary connected point mesh.

  • Point Generate

    Creates new points, optionally based on point positions in the input geometry.

  • Point Jitter

    Jitters points in random directions.

  • Point Relax

    Moves points with overlapping radii away from each other, optionally on a surface.

  • Point Replicate

    Generates a cloud of points around the input points.

  • Points from Volume

    Creates set of regular points filling a volume.

  • Poly Bridge

    Creates flat or tube-shaped polygon surfaces between source and destination edge loops, with controls for the shape of the bridge.

  • Poly Expand 2D

    Creates offset polygonal geometry for planar polygonal graphs.

  • Poly Extrude

    Extrudes polygonal faces and edges.

  • PolyBevel

    Creates straight, rounded, or custom fillets along edges and corners.

  • PolyBevel

    Bevels points and edges.

  • PolyCut

    Breaks curves where an attribute crosses a threshold.

  • PolyDoctor

    Helps repair invalid polygonal geometry, such as for cloth simulation.

  • PolyExtrude

    Extrudes polygonal faces and edges.

  • PolyFill

    Fills holes with polygonal patches.

  • PolyFrame

    Creates coordinate frame attributes for points and vertices.

  • PolyLoft

    Creates new polygons using existing points.

  • PolyPatch

    Creates a smooth polygonal patch from primitives.

  • PolyPath

    Cleans up topology of polygon curves.

  • PolyReduce

    Reduces the number of polygons in a model while retaining its shape. This node preserves features, attributes, textures, and quads during reduction.

  • PolySoup

    Combines polygons into a single primitive that can be more efficient for many polygons

  • PolySpline

    The PolySpline SOP fits a spline curve to a polygon or hull and outputs a polygonal approximation of that spline.

  • PolySplit

    Divides an existing polygon into multiple new polygons.

  • PolySplit

    Divides an existing polygon into multiple new polygons.

  • PolyStitch

    Stitches polygonal surfaces together, attempting to remove cracks.

  • PolyWire

    Constructs polygonal tubes around polylines, creating renderable geometry with smooth bends and intersections.

  • Pose Scope

    Assigns channel paths and/or pickscripts to geometry.

  • Primitive

    Edits primitive, primitive attributes, and profile curves.

  • Primitive Split

    Takes a primitive attribute and splits any points whose primitives differ by more than a specified tolerance at that attribute.

  • Profile

    Extracts or manipulates profile curves.

  • Project

    Creates profile curves on surfaces.

  • Python

    Runs a Python snippet to modify the incoming geometry.

  • RMan Shader

    Attaches RenderMan shaders to groups of faces.

  • Rails

    Generates surfaces by stretching cross-sections between two guide rails.

  • Ray

    Projects one surface onto another.

  • Refine

    Increases the number of points/CVs in a curve or surface without changing its shape.

  • Reguide

    Scatters new guides, interpolating the properties of existing guides.

  • Remesh

    Recreates the shape of the input surface using "high-quality" (nearly equilateral) triangles.

  • Repack

    Repacks geometry as an embedded primitive.

  • Resample

    Resamples one or more curves or surfaces into even length segments.

  • Rest Position

    Sets the alignment of solid textures to the geometry so the texture stays put on the surface as it deforms.

  • Reverse

    Reverses or cycles the vertex order of faces.

  • Revolve

    Revolves a curve around a center axis to sweep out a surface.

  • Rewire Vertices

    Rewires vertices to different points specified by an attribute.

  • Ripple

    Generates ripples by displacing points along the up direction specified.

  • Scatter

    Scatters new points randomly across a surface or through a volume.

  • Script

    Runs scripts when cooked.

  • Sculpt

    Lets you interactively reshape a surface by brushing.

  • Sequence Blend

    Morphs though a sequence of 3D shapes, interpolating geometry and attributes.

  • Sequence Blend

    Sequence Blend lets you do 3D Metamorphosis between shapes and Interpolate point position, colors…

  • Shrinkwrap

    Computes the convex hull of the input geometry and moves its polygons inwards along their normals.

  • Shrinkwrap

    Takes the convex hull of input geometry and moves its polygons inwards along their normals.

  • Skin

    Builds a skin surface between any number of shape curves.

  • Sky

    Creates a sky filled with volumentric clouds

  • Smooth

    Smooths out (or "relaxes") polygons, meshes and curves without increasing the number of points.

  • Smooth

    Smooths out (or "relaxes") polygons, meshes and curves without increasing the number of points.

  • Soft Peak

    Moves the selected point along its normal, with smooth rolloff to surrounding points.

  • Soft Transform

    Moves the selected point, with smooth rolloff to surrounding points.

  • Solid Conform

    Creates a tetrahedral mesh that conforms to a connected mesh as much as possible.

  • Solid Embed

    Creates a simple tetrahedral mesh that covers a connected mesh.

  • Solid Fracture

    Creates a partition of a tetrahedral mesh that can be used for finite-element fracturing.

  • Solver

    Allows running a SOP network iteratively over some input geometry, with the output of the network from the previous frame serving as the input for the network at the current frame.

  • Sort

    Reorders points and primitives in different ways.

  • Sphere

    Creates a sphere or ovoid surface.

  • Split

    Splits primitives or points into two streams.

  • Spray Paint

    Spray paints random points onto a surface.

  • Spring

    Simulates the behavior of points as if the edges connecting them were springs.

  • Sprite

    A SOP node that sets the sprite display for points.

  • Starburst

    Insets points on polygonal faces.

  • Stash

    Caches the input geometry in the node on command, and then uses it as the node’s output.

  • Stitch

    Stretches two curves or surfaces to cover a smooth area.

  • Stroke

    Low level tool for building interactive assets.

  • Stroke Cache

    Simplifies the building of tools that incrementally modify geometry based on strokes.

  • Subdivide

    Subdivides polygons into smoother, higher-resolution polygons.

  • Subnetwork

    The Subnet op is essentially a way of creating a macro to represent a collection of ops as a single op in the Network Editor.

  • Super Quad

    Generates an isoquadric surface.

  • Surfsect

    Trims or creates profile curves along the intersection lines between NURBS or bezier surfaces.

  • Sweep

    Creates a surface by sweeping cross-sections along a backbone curve.

  • Switch

    Switches between network branches based on an expression or keyframe animation.

  • Table Import

    Reads a CSV file creating point per row.

  • Test Geometry: Pig Head

    Creates a pig head, which can be used as test geometry..

  • Test Geometry: Rubber Toy

    Creates a rubber toy, which can be used as test geometry.

  • Test Geometry: Shader Ball

    Creates a shader ball, which can be used to test shaders.

  • Test Geometry: Squab

    Creates a squab, which can be used as test geometry.

  • Test Geometry: Tommy

    Creates a soldier, which can be used as test geometry.

  • Test Simulation: Crowd Transition

    Provides a simple crowd simulation for testing transitions between animation clips.

  • Test Simulation: Ragdoll

    Provides a simple Bullet simulation for testing the behavior of a ragdoll.

  • Tet Partition

    Partitions a given tetrahedron mesh into groups of tets isolated by a given polygon mesh

  • Tetrahedralize

    Performs variations of a Delaunay Tetrahedralization.

  • Time Warp

    Retimes the input to a different time range.

  • TimeBlend

    Blends intraframe values for geometry.

  • TimeShift

    Cooks the input at a different time.

  • Toon Shader Attributes

    Sets attributes used by the Toon Color Shader and Toon Outline Shader.

  • TopoBuild

    Lets you interactively draw a reduced quad mesh automatically snapped to existing geometry.

  • Torus

    Creates a torus (doughnut) shaped surface.

  • Trace

    Traces curves from an image file.

  • Trail

    Creates trails behind points.

  • Transform

    The Transform operation transforms the source geometry in "object space" using a transformation matrix.

  • Transform Axis

    Transforms the input geometry relative to a specific axis.

  • Transform By Attribute

    Transforms the input geometry by a point attribute.

  • Transform Pieces

    Transforms input geometry according to transformation attributes on template geometry.

  • Tri Bezier

    Creates a triangular Bezier surface.

  • TriDivide

    Refines triangular meshes using various metrics.

  • Triangulate 2D

    Connects points to form well-shaped triangles.

  • Trim

    Trims away parts of a spline surface defined by a profile curve or untrims previous trims.

  • Tube

    Creates open or closed tubes, cones, or pyramids.

  • Twist

    Applies deformations such as bend, linear taper, shear, squash/stretch, taper, and twist.

  • UV Brush

    Adjusts texture coordinates in the UV viewport by painting.

  • UV Edit

    Lets you interactively move UVs in the texture view.

  • UV Flatten

    Creates flattened pieces in texture space from 3D geometry.

  • UV Flatten

    Creates flattened pieces in texture space from 3D geometry.

  • UV Fuse

    Merges UVs.

  • UV Layout

    Tries to pack UV islands efficiently into a limited area.

  • UV Pelt

    Relaxes UVs by pulling them out toward the edges of the texture area.

  • UV Project

    Assigns UVs by projecting them onto the surface from a set direction.

  • UV Quick Shade

    Applies an image file as a textured shader to a surface.

  • UV Texture

    Assigns texture UV coordinates to geometry for use in texture and bump mapping.

  • UV Transform

    Transforms UV texture coordinates on the source geometry.

  • UV Transform

    Transforms UV texture coordinates on the source geometry.

  • UV Unwrap

    Separates UVs into reasonably flat, non-overlapping groups.

  • Unix

    Processes geometry using an external program.

  • Unpack

    Unpacks packed primitives.

  • Unpack Points

    Unpacks points from packed primitives.

  • VDB

    Creates one or more empty/uniform VDB volume primitives.

  • VDB Activate

    Activates voxel regions of a VDB for further processing.

  • VDB Activate SDF

    Expand or contract signed distance fields stored on VDB volume primitives.

  • VDB Advect Points

    Moves points in the input geometry along a VDB velocity field.

  • VDB Advect SDF

    Moves SDF VDBs in the input geometry along a VDB velocity field.

  • VDB Analysis

    Computes an analytic property of a VDB volumes, such as gradient or curvature.

  • VDB Clip

    Clips VDB volume primitives using a bounding box or another VDB as a mask.

  • VDB Combine

    Combines the values of two aligned VDB volumes in various ways.

  • VDB Diagnostics

    Tests VDBs for Bad Values and Repairs.

  • VDB Fracture

    Cuts level set VDB volume primitives into multiple pieces.


    Build an LOD Pyramid from a VDB.

  • VDB Morph SDF

    Blends between source and target SDF VDBs.

  • VDB Occlusion Mask

    Create a mask of the voxels in shadow from a camera for VDB primitives.

  • VDB Points Group

    Manipulates the Internal Groups of a VDB Points Primitive.

  • VDB Project Non-Divergent

    Removes divergence from a Vector VDB.

  • VDB Renormalize SDF

    Fixes signed distance fields stored in VDB volume primitives.

  • VDB Resample

    Re-samples a VDB volume primitive into a new orientation and/or voxel size.

  • VDB Reshape SDF

    Reshapes signed distance fields in VDB volume primitives.

  • VDB Segment by Connectivity

    Splits SDF VDBs into connected components.

  • VDB Smooth

    Smooths out the values in a VDB volume primitive.

  • VDB Smooth SDF

    Smooths out SDF values in a VDB volume primitive.

  • VDB Topology to SDF

    Creates an SDF VDB based on the active set of another VDB.

  • VDB Vector Merge

    Merges three scalar VDB into one vector VDB.

  • VDB Vector Split

    Splits a vector VDB primitive into three scalar VDB primitives.

  • VDB Visualize Tree

    Replaces a VDB volume with geometry that visualizes its structure.

  • VDB from Particle Fluid

    Generates a signed distance field (SDF) VDB volume representing the surface of a set of particles from a particle fluid simulation.

  • VDB from Particles

    Converts point clouds and/or point attributes into VDB volume primitives.

  • VDB from Polygons

    Converts polygonal surfaces and/or surface attributes into VDB volume primitives.

  • VDB to Spheres

    Fills a VDB volume with adaptively-sized spheres.


    References a VEX program that can manipulate point attributes.

  • Verify BSDF

    Verify that a bsdf conforms to the required interface.

  • Vertex

    Manually adds or edits attributes on vertices (rather than on points).

  • Vertex Split

    Takes a vertex attribute and splits any point whose vertices differ by more than a specified tolerance at that attribute.

  • Visibility

    Shows/hides primitives in the 3D viewer and UV editor.

  • Visualize

    Lets you attach visualizations to different nodes in a geometry network.

  • Volume

    Creates a volume primitive.

  • Volume Analysis

    Computes analytic properties of volumes.

  • Volume Arrival Time

    Computes a speed-defined travel time from source points to voxels.

  • Volume Blur

    Blurs the voxels of a volume.

  • Volume Bound

    Bounds voxel data.

  • Volume Break

    Cuts polygonal objects using a signed distance field volume.

  • Volume Compress

    Re-compresses Volume Primitives.

  • Volume Convolve 3×3×3

    Convolves a volume by a 3×3×3 kernel.

  • Volume FFT

    Compute the Fast Fourier Transform of volumes.

  • Volume Feather

    Feathers the edges of volumes.

  • Volume Merge

    Flattens many volumes into one volume.

  • Volume Mix

    Combines the scalar fields of volume primitives.

  • Volume Optical Flow

    Translates the motion between two "image" volumes into displacement vectors.

  • Volume Patch

    Fill in a region of a volume with features from another volume.

  • Volume Ramp

    Remaps a volume according to a ramp.

  • Volume Rasterize

    Rasterizes into a volume.

  • Volume Rasterize Curve

    Converts a curve into a volume.

  • Volume Rasterize Hair

    Converts fur or hair to a volume for rendering.

  • Volume Rasterize Particles

    Converts a point cloud into a volume.

  • Volume Rasterize Points

    Converts a point cloud into a volume.

  • Volume Reduce

    Reduces the values of a volume into a single number.

  • Volume Resample

    Resamples the voxels of a volume to a new resolution.

  • Volume Resize

    Resizes the bounds of a volume without changing voxels.

  • Volume SDF

    Builds a Signed Distance Field from an isocontour of a volume.

  • Volume Slice

    Extracts 2d slices from volumes.

  • Volume Splice

    Splices overlapping volume primitives together.

  • Volume Stamp

    Stamps volumes instanced on points into a single target volume.

  • Volume Surface

    Adaptively surfaces a volume hierarchy with a regular triangle mesh.

  • Volume Trail

    Computes a trail of points through a velocity volume.

  • Volume VOP

    Runs CVEX on a set of volume primitives.

  • Volume Velocity

    Computes a velocity volume.

  • Volume Velocity from Curves

    Generates a volume velocity field using curve tangents.

  • Volume Velocity from Surface

    Generates a velocity field within a surface geometry.

  • Volume Visualization

    Adjusts attributes for multi-volume visualization.

  • Volume Wrangle

    Runs a VEX snippet to modify voxel values in a volume.

  • Volume from Attribute

    Sets the voxels of a volume from point attributes.

  • Voronoi Fracture

    Fractures the input geometry by performing a Voronoi decomposition of space around the input cell points

  • Voronoi Fracture Points

    Given an object and points of impact on the object, this SOP generates a set of points that can be used as input to the Voronoi Fracture SOP to simulate fracturing the object from those impacts.

  • Voronoi Split

    Cuts the geometry into small pieces according to a set of cuts defined by polylines.

  • Vortex Force Attributes

    Creates the point attributes needed to create a Vortex Force DOP.

  • Whitewater Source

    Generates emission particles and volumes to be used as sources in a Whitewater simulation.

  • Wire Blend

    Morphs between curve shapes while maintaining curve length.

  • Wire Capture

    Captures surfaces to a wire, allowing you to edit the wire to deform the surface.

  • Wire Deform

    Deforms geometry captured to a curve via the Wire Capture node.

  • Wire Transfer Shape

    Transfers the shape of one curve to another.

  • Wireframe

    Constructs polygonal tubes around polylines, creating renderable geometry.