This is a bug fix release using Arnold


  1. Download Arnold for Houdini

  2. Follow these installation instructions

System Requirements

Houdini, Houdini FX, Houdini Indie and Houdini Education

  • 18.5.759

  • 19.0.720
  • 19.5.303
  • 19.5.368

  • Windows 10 or later, with the Visual Studio 2019 redistributable.
  • Linux with at least glibc 2.17 and libstdc++ 4.8.5 (gcc 4.8.5). This is equivalent to RHEL/CentOS 7.
  • macOS 10.13 or later.
  • CPUs need to support the SSE4.1 instruction set. Apple Mac models with M series chips are supported under Rosetta 2 mode.
  • GPU rendering works on Windows and Linux only and requires an NVIDIA GPU of the Ampere, Turing, Volta, Pascal, or Maxwell architecture.
  • Optix™ denoiser requires an NVidia GPU with CUDA™ Compute Capability 5.0 and above.

In the driver page select "Windows Driver Type:" DCH

The cache will also need to be re-populated after installing a new Arnold version, updating to a new NVIDIA driver, or changing the hardware configuration of GPUs on the system. More information can be found here.

Bug Fixes

  • HTOA-2032 - Fix import of shaders with matrix parameters 
  • HTOA-2035 - Update standard_volume folders

  • ARNOLD-10677 - smart opaque did not work on ginstances when source mesh is hidden
  • ARNOLD-12486 - Rocky 8 linux crash in kick on startup
  • ARNOLD-12487 - Crash when application exits
  • ARNOLD-12508 - Camera visible cylinder lights sometimes disappear when animate
  • ARNOLD-12544 - "Free Render" not initializing geometries in non-default universes
  • usd#1220 Fail to override output filename when AOVs are duplicated 
  • usd#1234 Fix udim with relative paths
  • usd#1247 Check if texture path is empty before trying to resolve it
  • usd#1238 Crash in the procedural with varying instance count
  • usd#1241 UsdUvTexture should always have ignore_missing_textures enabled
  • usd#1245 Read material bindings in the full purpose
  • usd#1252 Connect the UsdPreviewSurface opacity into arnold transmission
  • usd#1253 Add GeometryLight in CreateFallbackSprim
  • usd#1240 Don't remap vertex primvars for pinned curves 
  • usd#1269 Fix visibility of instanceable prims under a point instancer hierarchy
  • usd#1272 Avoid prefixing the primvars before getting their value for converting them to builtin parameter

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