ARNOLD-9773 - Exorbitant rays/pixel reported for first % progress report
ARNOLD-13909 - Crash with extreme numbers of overlapping volumes
ARNOLD-14068 - Incorrect smart opaque when a shader is assigned to an instancer
ARNOLD-14087 - Crash when writing a scene without a valid render session
ARNOLD-14110 - GPU crash when attempting to read an EXR/TX file that isn't present
ARNOLD-14138 - Round up initial progress stat in log so it reports 1% and not 0%
ARNOLD-14180 - Profiler uses too much memory in very long running renders
usd#1678 - Add support for Arnold shaders with multiple outputs
usd#1711 - Fix duplicated Arnold user data introduced in 7.2.3.0
usd#1728 - Fix Cryptomatte compatibility with Nuke.
System Requirements
Houdini, Houdini FX, Houdini Indie and Houdini Education
18.5.759
19.0.720
19.5.752
Linux with at least glibc 2.17 and libstdc++ 4.8.5 (gcc 4.8.5). This is equivalent to RHEL/CentOS 7.
macOS 10.13 or later, macOS 11 or later for Houdini 19.5
Apple Mac models with M series chips:
Natively supported by Arnold for Houdini 19.5
Supported under Rosetta 2 mode for older versions of Houdini
x86-64 CPUs need to support the SSE4.1 instruction set. Apple Mac models with M series chip are supported natively mode.
GPU rendering works on Windows and Linux only and requires an NVIDIA GPU of the Ada, Ampere, Turing, Volta, Pascal, or Maxwell architecture. We recommend using the 525.89 or higher drivers on Linux and 528.49, or higher on Windows. See Arnold GPU for more information.
For GPU rendering, the cache also needs to be re-populated after installing a new Arnold version, updating to a new NVIDIA driver, or changing the hardware configuration of GPUs on the system. More information can be found here.