Download and Installation

Arnold, KtoA, and other downloads are available here.  Installation instructions come with KtoA, but can also be viewed here: Installation.


  • Arnold: 4.2.16+
  • Katana: 2.1v5+, 2.5v4+
  • Platforms:
    • Linux: x86-64, RHEL 6+ or compatible glibc
    • Windows: 7+ on x86-64, with VC++ 2015 redistributable installed


  • Updated to Arnold KtoA is now updated to and requires Arnold; it brings improved oriented curves, faster min_pixel_width performance, better light portal controls, and a handful of bug fixes.  See the release notes for more information.

  • Instance override via child location: An instance location can now have a child location (usually of type locator) that, when it matches a child subpath of the instance source, will override and customize the transform, object settings and arbitrary/user data.  This allows much finer-grained customization of source children. (#113)

Bug Fixes

  • #123 Instance via ID visibility broken

  • #117 Customized shadow vs light links broken


  • No labels