4.9.3.4

8 October 2026

Arnold for Cinema 4D 4.9.3.4 is a bugfix release using Arnold 7.5.3.4. For the full list of features in Arnold for Cinema 4D 4.9.3, see the Arnold for Cinema 4D 4.9.3 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-3631 - Substance Assets do not update in the IPR
C4DTOA-3635 - Random crash in Commandline when loading a scene
ARNOLD-10973 - [GPU] Discrepancy in SSS LPEs compared to CPU
ARNOLD-12111 - OSL: rare "Failed parse of preloaded OSO code" with matrix
ARNOLD-17540 - [GPU] transform motion blur randomly dropped on procedural instances
ARNOLD-18220 - Random crash in network license checkout
ARNOLD-18267 - MaterialX conductor_bsdf Inputs Ignored in Arnold Render
ARNOLD-18359 - Fix crash from auto_transparency_depth = 0 on shadow-invisible mesh lights
ARNOLD-18415 - Crash when modifying vertex data interactively on a mesh light
ARNOLD-18455 - NaN shading normal from normal_map when object has a zero "normal" user parameter
ARNOLD-18481 - Texture invalidate did not work on Windows if use_existing_tx is disabled and the path uses backslashes
ARNOLD-18496 - mesh light should not emit light when its mesh is disabled
ARNOLD-18508 - Profiler sample counter thread is never joined and crashes the host after libai is unloaded
ARNOLD-18536 - IPR crash when editing meshes inside a procedural with native instances
ARNOLD-18549 - Make additional file output drivers a few ms faster on Linux
ARNOLD-18554 - Duplicate normal merge ignores motion keys after the first

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 12 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 590.48 or higher drivers.
- On Windows, we recommend 591.28 or higher drivers.
Intel OIDN runs on all CPUs. GPU support is limited to:
- macOS
  - Apple silicon GPUs (M1 and newer)
- Linux
  - NVIDIA GPUs with Turing, Ampere, Ada Lovelace, Hopper, and Blackwell architectures
- Windows
  - Intel Xe and Intel Arc dedicated and integrated GPUs
  - NVIDIA GPUs with Turing, Ampere, Ada Lovelace, Hopper, and Blackwell architectures
  - AMD GPUs with RDNA 2, RDNA 3, RDNA 3.5, and RDNA 4 architectures