7.4.1.1 - Arnold User Guide

6 May 2025

This is a bug-fix release. For the full list of features in Arnold 7.4.1, see the Arnold 7.4.1.0 release notes.

Bug Fixes

ARNOLD-16006 - Adding Cryptomatte causes Opacity AOV to be black
ARNOLD-16044 - [GPU] IPR crash when modifying a shape's parameter
ARNOLD-16116 - Render report fixes and cleanups
ARNOLD-16155 - Emission cone is too narrow for IES lights in Global Light Sampling
ARNOLD-16178 - [MaterialX] Interactive edits to published node graphs are ignored
ARNOLD-16181 - Performance regression in initialization of instanced procedurals
ARNOLD-16184 - Crash when options.outputs is set to a null array pointer
ARNOLD-16187 - Change default for procedural_instancing_optimization from exhaustive to conservative
ARNOLD-16214 - Procedural bounding box not correctly recalculated after adding nodes in procedural_update
ARNOLD-16247 - Crash when using AiProceduralExpand without a render session
usd#2269 - Fix lost shader connections when the Hydra procedural was updated (mtoa)
usd#2268 - Re-enable instancer motion blur on the first rendered frame by recomputing the transform matrices when the shutter is updated

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 10.13 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.
- On Linux, we recommend 560.35.03 or higher drivers.
- On Windows, we recommend 560.76 or higher drivers.
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