7.4.4.1 - Arnold User Guide

17 December 2025

Arnold 7.4.4.1 is a bug-fix release. For the full list of features in Arnold 7.4.4.0, see the Arnold 7.4.4.0 release notes.

Bug Fixes

• ARNOLD-16840 - Fixed custom AOV settings resetting when in interactive mode.
• ARNOLD-17049 - Fixed bloom rotation in aperture mode for angles below -180°
• ARNOLD-17058 - [GPU] Fixed incorrect per-depth ray counts reported in stats.
• ARNOLD-17076 - Fixed random missing lights when using light_group and shadow_group on ginstance.
• ARNOLD-17088 - Fixed random crash when using curves and points nodes with min_pixel_width.
• ARNOLD-17140 - Faster procedural node destruction when most of its nodes are modified. Fixes very slow instancer destruction.
• ARNOLD-17149 - [GPU] Fixed small per-instance GPU memory leak.
• ARNOLD-17151 - Fixed an incorrect "Rendering CPU utilization was only 0%" message being reported when utilization was greater than 0%.
• ARNOLD-17171 - Fixed AiTextureTxFileNeedsUpdate returning false when colorconvert arguments contain empty spaces.
• usd#2467 - Hidden primitives do not show up when turned visible
• usd#2472 - Regression in render settings default value for autoTX
• usd#2478 - Support the Z AOV for the Hydra depth buffer
• usd#2486 - Fix a crash in the scene index happening when the typename is not yet defined
• usd#2481 - Fix regression with camera motion blur in Solaris

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 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.
  • On Linux, we recommend 580.95.05 or higher drivers.
  • On Windows, we recommend 581.42 or higher drivers.
• Intel OIDN GPU support is limited to:
  • macOS
    • Apple native CPUs (M1 and newer)
  • Linux
    • NVIDIA GPUs using Turing or newer architectures
  • 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