KtoA 4.4.2.2 - Arnold for Katana

July 2, 2025

KtoA 4.4.2.2 uses Arnold 7.4.2.2 and is a bugfix release. For the full list of features in KtoA 4.4.2.0, see the KtoA 4.4.2.0 release notes.

Installation

ARNOLD-13885 - Arnold GPU does not match CPU for polymesh.matte
ARNOLD-14922 - Matrix modification of child object matrix in procedural_update is randomly ignored
ARNOLD-15574 - Broken Cryptomatte due to NVIDIA compiler/driver float bug starting with 553.09
ARNOLD-16333 - MaterialX relative path does not work with Arnold
ARNOLD-16328 - Bucket corners stay at the end of the rendering in ARV with imagers
ARNOLD-16410 - Numerical precision error in camera shutter_curve when almost 1
ARNOLD-16415 - Don't reinterpret_type the pointers
ARNOLD-16418 - Crash when adding objects to a funcptr procedural
ARNOLD-16492 - Regression in procedural destruction time
usd#2340 - Fix warnings when nodes are deleted during batch sessions
usd#2334 - Fix random crashes with husk and cryptomatte

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 7. For Katana 7.0 and newer, an equivalent of RHEL 8 or newer is required.
x86-64 CPUs need to support the SSE4.1 instruction set.
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.
Katana Katana 6.0v1 or newer, Katana 6.5v1 or newer, Katana 7.0v1 or newer, Katana 7.5v1 or newer, or Katana 8.0v1 or newer.
Intel OIDN GPU support is limited to:
- 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