19 June 2024
MtoA 5.4.2.1 uses Arnold 7.3.2.1. See also the MtoA 5.4.2 release notes.
Download Arnold for Maya from your Autodesk Account. See Download Arnold for more information about downloading MtoA from your Autodesk Account.
Follow these installation instructions.
MTOA-1988 - .bundle libraries not packaged correctly on macOS installs
MTOA-1969 - Python error when loading MtoA before mayaUSD
MTOA-1959 - Snapshots are removed after toggling snapshots folder on and then off
MTOA-1914 - Incorrect UV transform translation for imported ramp shaders
MTOA-1968 - Xgen extension fails to add Arnold attributes in Maya 2025
ARNOLD-14365 - Fix AiNodeGetMatrix to return node matrix instead of identity after node initialization in batch renders
ARNOLD-14779 - AtProfiledLockable not compiling on Windows in newer MSVC due to Mutex::native_handle_type
ARNOLD-14893 - [GPU] 4MB GPU memory leak per frame
ARNOLD-15041 - Arnold does not run on Linux distros with glibc 2.39 (RHEL 9.4)
ARNOLD-15048 - Fix OIDN dll name clash with DCCs by renaming OIDN libraries
ARNOLD-15060 - Arnold should not catch C++ exceptions it did not generate
ARNOLD-15087 - uv_projection shader uses corrupt UVs for evaluating its default_color shader
ARNOLD-15121 - [GPU] crash when CUDA error has no message
ARNOLD-15122 - Crash destroying a light that is part of a light group
ARNOLD-15136 - Random hang when parallel initializing scene
ARNOLD-15169 - Crash when modifying a child node from procedural_update
usd#1923 - Fix instance primvar indices with multiple prototypes
usd#1929 - Ensure subdiv_iterations is not set unnecessarily during procedural updates
usd#1932 - Fix a crash when the number of elements in a primvar is not equal to the number of points