7.5.1.2 27 May 2026
Arnold 7.5.1.2 is a bug-fix release. For the full list of features, bug fixes, and incompatible changes in Arnold 7.5.1.0, see the Arnold 7.5.1.0 release notes .
Bug Fixes
ARNOLD-8717 - Interactive changes to a sphere center or radius are not transferred to its instances
ARNOLD-12159 - Dispersion transmission incorrectly raises error_color_bad_pixel debug coloring (blue pixels)
ARNOLD-14076 - standard_hair shading artifacts when used with non-curves objects
ARNOLD-15737 - Fix Ctrl+C (SIGINT) being ignored when Arnold is run in background or automated runs
ARNOLD-16842 - Modification of child object matrix in procedural_update is randomly ignored
ARNOLD-17339 - Log messages that were intended to show up only once could show up multiple times
ARNOLD-17411 - kick crashes when you render an ASS file that does not define any render outputs
ARNOLD-17682 - Some node parameter changes can be randomly lost during scene update
ARNOLD-17696 - Error when assigning MaterialX shader to a USD prim
ARNOLD-17708 - Crash on process exit when Arnold library is loaded with deep bindings
ARNOLD-17712 - SSS is broken with native instancing
ARNOLD-17728 - Fix regression of rare crash when compiling OSL shaders during IPR
ARNOLD-17748 - Fix random crashes/hangs at process exit and during rendering with network (NLM) licenses
ARNOLD-17757 - Artifacts when using oriented curves with a scaled transform matrix
ARNOLD-17766 - Point cloud cache causes a CUDA exception when used with multiple GPUs
ARNOLD-17769 - Fix random crash/hang at process exit caused by AiMsg calls when missing AiEnd
ARNOLD-17771 - Rare crash at process exit when using Arnold denoiser (noice) imager
ARNOLD-17794 - GPU rendering issue with native shape instancing
ARNOLD-17801 - Procedural instances sometimes do not render in conservative optimization mode
ARNOLD-17803 - Rare crash when instancing procedurals
ARNOLD-17807 - Random GPU crash in optixQueryFunctionTable after modifying objects
ARNOLD-17808 - kick -o does not work if drivers NULL in ASS file
ARNOLD-17817 - Kick output directory prefix is not applied when overriding the filename via -set
usd#2635 - Fix rounding issue with husk when overscan is used at certain resolutions
System Requirements
Windows 10 or later, with the Visual Studio 2019 redistributable.
Linux with at least glibc 2.28. This is equivalent to RHEL/Rocky 8.
macOS 12 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 runs on all CPUs. GPU support is limited to:
macOS
Apple silicon GPUs (M1 and newer)
Linux
NVIDIA GPUs with Turing, Ampere, Ada Lovelace, Hopper, and Blackwell architectures
Windows
Intel Xe and Intel Arc dedicated and integrated GPUs
NVIDIA GPUs with Turing, Ampere, Ada Lovelace, Hopper, and Blackwell architectures
AMD GPUs with RDNA 2, RDNA 3, RDNA 3.5, and RDNA 4 architectures