Houdini 18.5 Nodes Render nodes

USD Zip render node

Assembles USDZ archive files from existing USD files.

Since 18.0

This node creates a USD Zip archive (.usdz) file from existing USD files on disk. This process combines the original USD file, along with any referenced USD files and texture maps, and places them all into a single file. This single file can then be loaded like any other USD file into Houdini, usdview, or any other application that can read USD files. Because it is a single file, it is easier to distribute than the large, disjoint collection of files that often make up a USD Stage.

The operation of this ROP matches the behavior of the usdzip utility script included with the USD library, except that it only operates in "asset" or "ARKit asset" modes, where a single input file is provided, and referenced files are automatically included in the archive.



Click to generate the USDZ file.

Zip Files

This node can generate multiple archives at once. Set this to the number of archives to create, or click the plus and minus buttons to add or remove archives.


You can use this to disable generation of an archive without losing the parameter values.

Input File

File path of the top level USD file to use to generate the archive. The node will automatically find all dependent files (sublayer files, textures, volumes) and include them in the archive.

Output File

File path of the .usdz archive file to generate.

Create ARKit Asset

This option instructs the USD library to create a USDZ archive file that is compatible with The Apple ARKit library. Assets targeted at the initial USDZ implementation in ARKit operate under greater constraints than USDZ files for more general uses, and this option attempts to ensure that these constraints are honored. This may involve more transformations to the data, which may cause loss of features such as Variant Sets.

Render nodes

  • Agent

    This output operator is used to write agent definition files.

  • Alembic

  • Archive Generator

    Generates disk-based archives which can be used by either mantra or RIB renderers.

  • Bake Animation

    Bakes animation from object transforms and CHOP overrides.

  • Bake Texture

    Generates a texture map from one or more objects' rendered appearance.

  • Batch

    Renders the input ROP in a single batch job.

  • Brick Map Generator

    Allows you to convert Houdini volume primitives into Pixar brickmap files.

  • Channel

    The Channel output operator generates clip files from a particular CHOP.

  • Composite

    The Composite output operator renders the image(s) produced in the Compositing Editor.

  • DSM Merge

    Merges two or more deep shadow/camera map files.

  • Dynamics

    Saves the state of a DOP network simulation into files.

  • Fetch

    Makes a dependency link to a ROP in a different network.

  • Filmbox FBX

    Exports entire scenes to FBX files.

  • Filmbox FBX Animation

    Export animation from geometry-based skeleton to an FBX file.

  • Filmbox FBX Character

    Export a skinned character with geometry-based skeleton to an FBX file.

  • Frame Container

    Prevents frame dependency changes in the contained nodes from affecting its inputs.

  • Frame Depedency

    Allows an output frame to depend on one or more input frames.

  • Geometry

    Generates geometry files from a SOP or DOP network.

  • HQueue Render

    HQueue, or Houdini Queue, is a distributed job scheduling system.

  • HQueue Simulation

    HQueue, or Houdini Queue, is a distributed job scheduling system.

  • Hair Card Texture

    Renders hair textures for use on hair cards.

  • Karma

    Renders the USD scene using Houdini’s Karma renderer (Beta).

  • MDD Point Cache

    This output operator is used to write an MDD animation file.

  • Mantra

    Renders the scene using Houdini’s standard mantra renderer and generates IFD files.

  • Mantra Archive

    Generates disk-based archives which can be used by mantra.

  • Merge

    Merges several render dependencies into one.

  • Net Barrier

    Blocks the ROP network until synchronization occurs.

  • Null

    Does nothing.

  • OpenGL

    Render an image using the hardware-accelerated 3D viewport renderer.

  • Pre Post

    Renders ROPs before and after a main job.

  • Render nodes

    Render nodes either render the scene or set up render dependency networks.

  • Shell

    Runs an external command.

  • Subnetwork

    The SubNetwork output operator provides an easy way to manage large number of output operators.

  • Switch

    Renders one of several inputs.

  • Tractor

    Tractor is a program shipped out with Pixar’s distribution of RenderMan.

  • USD

    Renders a LOP network out to one or more USD files. This node is available as render node or as a LOP.

  • USD Render

    Renders an output image from the stage generated by a LOP network.

  • USD Stitch

    Merges USD files representing individual frames by composing them.

  • USD Stitch Clips

    Merges multiple value clips representing individual frames.

  • USD Zip

    Assembles USDZ archive files from existing USD files.

  • Wedge

    Re-renders the same ROP multiple times with different settings

  • Wren

    This output operator is used to drive the Wren rendering program.

  • glTF

  • glTF