4.8.5.1 - Arnold for Cinema 4D

17 December 2025

C4DtoA 4.8.5.1 uses Arnold 7.4.4.1 and is a bugfix release. For the full list of features in C4DtoA 4.8.5, see the C4DtoA 4.8.5 release notes.

Installation

Download Arnold for Cinema 4D from your Autodesk Account. See Download Arnold for more information about downloading C4DtoA from your Autodesk Account.
Follow these installation instructions.

C4DTOA-3488 - Light Manager does not solo a light if it is in a hierarchy
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

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 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