7.4.3.1
27 August 2025
Arnold 7.4.3.1 is a bug-fix release. For the full list of features in Arnold 7.4.3.0, see the Arnold 7.4.3.0 release notes.
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 on root meshes 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
- Windows 10 or later, with the Visual Studio 2019 redistributable.
- Linux with at least glibc 2.17 and libstdc++ 4.8.5 (gcc 4.8.5). This is equivalent to RHEL/CentOS 7.
- macOS 11 or later.
- x86-64 CPUs need to support the SSE4.1 instruction set. Apple Mac models with M series chips are natively supported.
- GPU rendering and OptiX denoising work on Windows and Linux only, and require an NVIDIA GPU with the Maxwell architecture or later.
- 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