HtoA 3.2.2

14 January 2019


This is a bug fix release, fixing a packed primitive instancing issue and locks up during TX file generation.


  1. Get the install files on Solid Angle Downloads.
  2. Follow these installation instructions.


This release uses Arnold and OpenVDB 4.0.0.

Binaries available for the following Houdini, Houdini FX, Houdini Indie and Houdini Education production builds:

  • 16.5.634
  • 17.0.416
  • 17.0.459


and for the following platforms:

  • Linux x86_64 (H16: gcc4.8 and H17: gcc6.3)
  • Windows 7 x64 (H16: vc14 and H17: vc14.1)
  • Mac OS X 10.8+ (clang7.3)


Please note that Houdini Apprentice does not support third-party renderers and thus cannot run HtoA.


  • CopyToPoints and CopyTransform instancing fix (htoa#1159)
  • Houdini locks up during TX file generation (htoa#1151, core#7794)
  • AutoTX should consider texture search path (htoa#796)

  • Search path file choosers not accepting directories (htoa#1146)

  • Crash connecting FumeFX shader (htoa#1161)

  • Running AiMakeTx in parallel can consume too much memory (core#6376)

  • Arnold crashes when you try to write out render stats (core#7741)

  • Space transform screen space issue (core#7760)

  • Subdivs: per face iterations should be ignored if type is not BYTE (core#7763)

  • Crash when using polygon holes (core#7781)

  • Contour filter memory leak (core#7803)

  • Change error to warning when OSL output keyword is missing (core#7805)

  • maketx was not automatically doing --opaque-detect (core#7808)


See also the Arnold release notes for the full list of core enhancements and fixes.


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