HtoA 6.3.2.1

19 June 2024

HtoA 6.3.2.1 is minor feature release using Arnold 7.3.2.1.

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-2610 - Fixed 'unresolved reference' errors when instancing multiple packed primitives

• HTOA-2606 - Fixed incorrect motion blur on .ass instances

• ARNOLD-14365 - Fix AiNodeGetMatrix to return node matrix instead of identity after node initialization in batch renders

• ARNOLD-14779 - AtProfiledLockable not compiling on Windows in newer MSVC due to Mutex::native_handle_type

• ARNOLD-14893 - [GPU] 4MB GPU memory leak per frame

• ARNOLD-15041 - Arnold does not run on Linux distros with glibc 2.39 (RHEL 9.4)

• ARNOLD-15048 - Fix OIDN dll name clash with DCCs by renaming OIDN libraries

• ARNOLD-15060 - Arnold should not catch C++ exceptions it did not generate

• ARNOLD-15087 - uv_projection shader uses corrupt UVs for evaluating its default_color shader

• ARNOLD-15121 - [GPU] crash when CUDA error has no message

• ARNOLD-15122 - Crash destroying a light that is part of a light group

• ARNOLD-15136 - Random hang when parallel initializing scene

• ARNOLD-15169 - Crash when modifying a child node from procedural_update

• usd#1923 - Fix instance primvar indices with multiple prototypes

• usd#1929 - Ensure subdiv_iterations is not set unnecessarily during procedural updates

• usd#1932 - Fix a crash when the number of elements in a primvar is not equal to the number of points

System Requirements

• Houdini, Houdini FX, Houdini Indie and Houdini Education
  • 19.0.720
  • 19.5.805
  • 20.0.724
• Linux with at least glibc 2.28 and libstdc++ 9.3.1 (gcc 9.3.1) for Houdini 19, 19.5, and 20. 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. This is equivalent to Rocky 8.
• macOS 10.13 or later, macOS 11 or later for Houdini 19.5
• Apple Mac models with M series chips:
  • Natively supported by Arnold for Houdini 19.5
  • Supported under Rosetta 2 mode for older versions of Houdini
• 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 535.104 or higher drivers.
  • On Windows, we recommend 537.13 or higher drivers.
• Optix™ denoiser requires an NVidia GPU with CUDA™ Compute Capability 5.0 and above.