HtoA 6.4.1.1
6 May 2025
HtoA 6.4.1.1 is a bugfix release that uses Arnold 7.4.1.1. For the full list of features in HtoA 6.4.1, see the HtoA 6.4.1 release notes.
Installation
Bug Fixes
- HTOA-2907 - Fixed classic HtoA IPR on Mac (caused by incorrect rpaths)
- HTOA-2138 - Import materials now sets uv_projection.matrix properly
- HTOA-2902 - Arnold ROP no longer explicitly checks if a directory is writable when Create Intermediate Directories is set
- ARNOLD-16006 - Adding Cryptomatte causes Opacity AOV to be black
- ARNOLD-16044 - [GPU] IPR crash when modifying a shape's parameter
- ARNOLD-16116 - Render report fixes and cleanups
- ARNOLD-16155 - Emission cone is too narrow for IES lights in Global Light Sampling
- ARNOLD-16181 - Performance regression in initialization of instanced procedurals
- ARNOLD-16184 - Crash when
options.outputs is set to a null array pointer
- ARNOLD-16187 - Change default for
procedural_instancing_optimization from exhaustive to conservative
- ARNOLD-16214 - Procedural bounding box not correctly recalculated after adding nodes in
procedural_update
- ARNOLD-16247 - Crash when using
AiProceduralExpand without a render session
- usd#2269 - Fix lost shader connections when the Hydra procedural was updated (mtoa)
- usd#2268 - Re-enable instancer motion blur on the first rendered frame by recomputing the transform matrices when the shutter is updated
System Requirements
- Houdini, Houdini FX, Houdini Indie and Houdini Education
- 19.5.805
- 20.0.896
- 20.5.584
- 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.
- 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