Houdini 17.0 Shelf tools

Suction Fluid shelf tool

Creates a suction force to guide particles fluids toward a target object.

The Suction Fluid tool creates a force at the fluid surface to draw it toward a target object. This is useful for creating a suction-like force and filling a target object with fluid.


The fluid must be a FLIP fluid. Suction fluid will not work with volume fluids.

The Suction Fluid tool will create two nodes, antigravity and suctionforce, in the FLIP Solver. The antigravity node reduces gravity inside the suction force range of influence to reduce the strength of the suction force required to lift upwards. The suctionforce node controls the strength of force (using Suction Strength) and how far the influence of the force reaches (using Outside Distance).

The voxel size used in the collision source is initially set to the resolution of the FLIP simulation. This might need to be adjusted to better represent the target object.

Thin features in the target object will require a high resolution fluid simulation to full represent them with the fluid surface.

Using Suction Fluid

  1. Create a FLIP fluid simulation and a target object.

  2. Click the Suction Fluid tool on the Particle Fluids tab.

  3. Select the target object for the FLIP fluid to be drawn to, and press Enter.

  4. Select the FLIP fluid to apply suction to, and press Enter.

The following example shows the rubber toy as the target object of the suction fluid tool. The fluid is drawn up into the object, filling it with FLIP particles and creating a fluid representation of the target object.


Using a wide Outside Distance will target more particles but also tends to full up the region outside the target object. Reducing Outside Distance once the target is full is a good approach for matching the target object surface with FLIP fluid.

Shelf tools

Using the shelf

  • Customize the shelf

    How to change the look of the shelf, change and rearrange its contents, and create your own shelf tools.

Shelf tabs

  • Create tab

    Tools on the Create tab let you create and place primitives, curves, and null objects in the scene view.

  • Modify tab

    Tools on the Modify tab let you easily customize objects in the scene view.

  • Model tab

    Tools on the Model tab let you edit objects in the scene view.

  • Polygon tab

    Tools on the Polygon tab let you modify polygons in the scene view.

  • Deform tab

    Tools on the Deform tab let you deform objects in the scene view.

  • Texture tab

    Tools on the Texture tab let you texture objects in the scene view.

  • Rigging tab

    The Rigging tab contains tools for creating premade rigs.

  • Muscles tab

    The Muscles tab contains tools for creating muscles.

  • Characters tab

    Tools on the Character tab let you create characters in the scene view.

  • Constraints tab

    Tools on the Constraints tab create a constraint network where you can constrain objects to each other in the scene view.

  • Hair Utils tab

    Tools on the Hair Utils tab let you quickly set up hair and fur on objects.

  • Guide Process tab

    Tools on the Guide Process tab let you influence the placement and orientation of guide hairs by painting skin attributes.

  • Guide Brushes tab

    Tools on the Grooming tab let you add and directly manipulate hair.

  • Terrain FX shelf tab

  • Cloud FX tab

    The Cloud FX tab contains tools for creating cloud effects.

  • Volume tab

    The Volume tab contains tools for creating volume effects.

  • Lights and Cameras tab

    Tools on the Lights and Cameras tab let you create and place lights and cameras in the scene view.

  • Collisions tab

    Tools on the Collisions tab let you create collision objects in the scene view.

  • Particles tab

    Tools on the Particles tab let you create dynamic particle simulations.

  • Grains tab

    The Grains tab contains tools for simulate grains of sand and other granular matter.

  • Vellum tab

    The Vellum tab contains tools for creating different types of vellum effects.

  • Rigid Bodies tab

    Tools on the Rigid Bodies tab let you create dynamic RBD objects in the scene view.

  • Particle Fluids tab

    Tools on the Particle Fluids tab let you create particle based liquids in the scene view.

  • Viscous Fluids tab

    Viscous fluids are FLIP simulations that use a temperature attribute to drive viscosity.

  • Oceans tab

    The Oceans tab contains tools for creating ocean simulations.

  • Fluid Containers tab

    The Fluid Containers tab contains tools for creating pyro, smoke, and liquid containers.

  • Populate Containers tab

    The Populate Containers tab contains tools for creating and removing fire, smoke, and liquid.

  • Container Tools tab

    The Container Tools tab contains tools for manipulating fire, smoke, and liquid.

  • Pyro FX tab

    Tools on the Pryo FX tab let you create simulated smoke and fire effects.

  • Solid tab

    Tools on the Solid tab let you create and modify solid objects.

  • Wires tab

    Tools on the Wires tab let you create flexible dynamic objects in the scene view.

  • Crowds tab

    The Crowds tab contains tools for creating crowds, crowd behaviors, as well as examples.

  • Drive Simulation tab

    Tools on the Drive Simulation tab let you manipulate dynamic objects in the scene view.