HtoA 6.3.6.1

29 January 2025

HtoA 6.3.6.1 is a bugfix release that uses Arnold 7.3.6.1. For the full list of features in HtoA 6.3.6, see the HtoA 6.3.6 release notes.

Installation

• Download Arnold for Houdini from your Autodesk Account. See Download Arnold for more information about downloading HtoA from your Autodesk Account.

• Follow these installation instructions

Bug Fixes

• HTOA-2829 - Fixed an error in the Arnold Edit Material LOP when incompatible VOP connections are made
• HTOA-2830 - Ramp connections now work properly in the Arnold Edit Material LOP
• ARNOLD-15733 - [MaterialX] NodeGraph interface inputs with custom names do not render correctly with Arnold
• ARNOLD-15717 - [MaterialX] The defaultgeomprom input property on node definitions is ignored when the input has a NodeGraph interface
• ARNOLD-15741 - kick -set driver_exr.filename does not handle long strings
• ARNOLD-15755 - Not calling AiEnd() results in an "Error 1 when uninitializing ADP"
• ARNOLD-15756 - Non-rectangular quad lights should be a warning instead of an error
• ARNOLD-15742 - driver_exr.custom_attributes do not work if you use Cryptomatte
• ARNOLD-15682 - If parameter is not in UI group metadata it is missing from kick -info
• ARNOLD-15836 - [GPU] Fix potential rare crash on exit or when deleting objects

System Requirements

• Houdini, Houdini FX, Houdini Indie and Houdini Education
  • 19.5.805
  • 20.0.896
  • 20.5.487
• Linux with at least glibc 2.28 and libstdc++ 9.3.1 (gcc 9.3.1) for Houdini 19.5, 20 and 20.5. This is equivalent to RHEL/CentOS 7.
• Linux with at least glibc 2.17 and libstdc++ 11.2.1 (gcc 11.2.1) for Houdini 20/20.5. This is equivalent to Rocky 8.
• macOS 11 or later
• Apple Mac models with M series chips are natively supported by HtoA
• x86-64 CPUs need to support the SSE4.1 instruction set. Apple Mac models with M series chip are supported natively mode.
• GPU rendering works on Windows and Linux only and requires an NVIDIA GPU with the Maxwell architecture or later.
  • On Linux, we recommend 560.35.03 or higher drivers.
  • On Windows, we recommend 560.76 or higher drivers.
• Optix™ denoiser requires an NVidia GPU with CUDA™ Compute Capability 5.0 and above.
• Intel OIDN GPU support is limited to:
  • MacOS
    • Apple native CPUs (M1 and newer)
  • Windows
    • Intel Xe dedicated and integrated GPUs
    • NVIDIA GPUs using Turing or newer architectures
    • AMD GPUs with RDNA2 (Navi 21 only) and RDNA3 (Navi 3x) architectures