01 April 2026
HtoA 6.4.6.2 is a bugfix release using Arnold 7.4.5.2. For the full list of features in HtoA 6.4.6.0, see the HtoA 6.4.6.0 release notes.
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
Except for ARNOLD-16573 and ARNOLD-17500, these bug fixes are not included in Arnold 7.5.0.0 and Arnold 7.5.1.0
ARNOLD_ND_image MaterialX node definition input order mismatch that caused viewport shader compilation failureHoudini, Houdini FX, Houdini Indie and Houdini Education
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 supported in native mode
x86-64 CPUs need to support the SSE4.1 instruction set.
GPU rendering works on Windows and Linux only and requires driver versions newer than 582.16/580.126 (Windows/Linux). Older drivers will log an error and abort the render. Note that you can use New Feature Branch drivers.
Optix™ denoiser requires an NVidia GPU with CUDA™ Compute Capability 5.0 and above.
Intel OIDN GPU support is limited to: