4.4.3.1 - Arnold for Katana
27 August 2025
Arnold for Katana 4.4.3.1 uses Arnold 7.4.3.1 and is a bugfix release. For the full list of features in KtoA 4.4.3.0, see the KtoA 4.4.3.0 release notes.
Important: The Arnold 7.4.3.x releases are the last Arnold releases that will include support for CentOS 7.
Installation
- Download Arnold for Katana from your Autodesk Account.
- Follow these installation instructions.
Bug Fixes
- ARNOLD-16317 - Corrupt BVH was generated in certain rare situations, resulting in crashes or missing objects
- ARNOLD-16439 - Removed "missing parallel_init metadata" warning for funcptr procedurals
- ARNOLD-16569 - AiProceduralExpand does not work with triggers_reinitialize
- ARNOLD-16576 - MaterialX documents containing textures with UDIMs and relative paths do not render
- ARNOLD-16591 - GPU update is slow with negative progressive rendering and high AA
- ARNOLD-16612 - Very large unnormalized lights can have NaN in bounds
- ARNOLD-16615 - Only reevaluate procedural instancing optimization when scene is modified
- ARNOLD-16622 - Modified lights in IPR are not properly accounted for with global light sampling
- ARNOLD-16752 - Geometry changes are not reflected in the scene bounding box
- ARNOLD-16576 - MaterialX documents containing textures with UDIMs and relative paths does not render
- usd#2349 - Fix Husk renders using the Arnold product type overwriting the same output path when rendering multiple frames in same proces
- usd#2392 - Fix a warning due to additional metadata parameters, typeName, and colorSpace introduced in USD 25.05
System Requirements
- Foundry Katana 5.0v6, 6.0v1
- Linux with at least glibc 2.17 and libstdc++ 4.8.5 (gcc 4.8.5)
- x86-64 CPUs need to support the SSE4.1 instruction set
- GPU rendering requires an NVIDIA GPU with Maxwell architecture or later. We recommend 570.153.02 or higher drivers.
- Optix denoiser requires an NVidia GPU with CUDA Compute Capability 5.0 and above.