HtoA 6.5.1.3

16 June 2026

Arnold for Houdini 6.5.1.3 is a bugfix release using Arnold 7.5.1.3. For the full list of features in Arnold for Houdini 6.5.1.0, see the Arnold for Houdini 6.5.1.0 release notes.

Installation

Download Arnold for Houdini from your Autodesk Account. See Download Arnold for more information about downloading HtoA from your Autodesk Account.
Follow these installation instructions

ARNOLD-17901 - OIDN imager crashes when using overscan
ARNOLD-17909 - Crash at node_update with light linking and procedural auto-instancing
ARNOLD-17913 - Crash when OSL texture filenames contain certain backslashed characters
ARNOLD-17928 - kick -merge fails for outputs with .

Houdini, Houdini FX, Houdini Indie, and Houdini Education
- 20.0.896
- 20.5.684
- 21.0.729
Flow Render is available for the default Houdini Qt versions ( Qt6 for Houdini 21, and Qt5 for Houdini 20.5 and Houdini 20.0)
Linux with at least glibc 2.28 and libstdc++ 11.2.1 (gcc 11.2.1). This is equivalent to Rocky 8.
macOS 11 or later
Apple Mac models with M series chips are natively supported by HtoA
x86-64 CPUs need to support the SSE4.1 instruction set. Apple Mac models with M series chip are supported natively.
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