You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 8 Current »


HtoA is a bug fix release using Arnold

Please download the .py3 version of the HtoA installer when installing the Python 3 versions of Houdini.


  1. Download Arnold for Houdini

  2. Follow these installation instructions

System Requirements

Houdini, Houdini FX, Houdini Indie and Houdini Education

  • 18.0.597

  • 18.5.759

  • 19.0.589

  • 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-1969 - Allow negative values in the overscan parameter on the Arnold ROP
  • ARNOLD-12230 - Crash when rendering quad lights with non-default roundness in multiple render sessions
  • ARNOLD-12229 - Crash when adjusting a camera used across multiple render session lifetimes
  • ARNOLD-12228 - Deep driver crashes when batch rendering with progressive negative-AA
  • ARNOLD-12223 - Do not show a dialog box when loading invalid plugins on Windows
  • ARNOLD-12216 - Thread priority was no longer affecting render threads on Windows
  • ARNOLD-12208 - Crash when destroying and recreating a RenderSession with GPU rendering or Optix denoising
  • ARNOLD-12054 - Restarted checkpoint renders were always starting progress at 0%
  • ARNOLD-12192 - [Alembic] Root of b-spline curve is cut short
  • ARNOLD-12253 - [GPU] Crash when deleting and creating render sessions for the same universe
  • ARNOLD-12037 - [GPU] Artifacts in Light Path Expression AOVs using closure labels
  • No labels
Privacy settings / Do not sell my personal information / Privacy/Cookies