Download and Installation

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


  • Arnold: 5.0.2+
  • Katana: 2.5v6+, 2.6v1+
  • Platforms:
    • Linux: x86-64, RHEL 6+ or compatible glibc
    • Windows: 7+ on x86-64, with VC++ 2015 redistributable installed


  • Update to Arnold included core version has been updated to5.0.2.3with a handful of handy bug fixes.

  • Light blocker transforms: Light blockers now work as intended, and use the accumulated transforms of any locations they are under. They also properly update during live rendering, as do all light filters whether they are gafferthree light packages or shader slots on lights. (#197, #257) 

Incompatible Changes

  • Specular transmitted ray visibility: There was a typo for AI_RAY_SPECULAR_TRANSMIT, which has been corrected. The update shelf script should be run to rename your old parameter to the fixed version. (#258)

Bug Fixes

  • #196 Light filter child packages don't update in live rendering

  • #256 Light filters not getting attached to lights

  • #257 Light blocker transforms are incorrect
  • #258 Typo in objectSettings.xml
  • #260 Object IDs not being sent correctly to Katana



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