10 March 2017

This is a bugfix release, bringing Houdini 16 support.

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

This release uses Arnold and OpenVDB 3.1.0.

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

  • 15.5.607
  • 15.5.717
  • 16.0.504.20

and for the following platforms:

  • Linux x86_64 (gcc4.8)
  • Windows 7 x64 (vc14)
  • Mac OS X 10.8+ (clang7.3)

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

If you are using the Qt4 version of Houdini 16.0.504.20, a Python exception will occur when activating certain items of the Arnold menu such as "About HtoA":

An error occurred while executing menu Python script.
No module named PySide2.QtGui

Please locate and overwrite the following file in your HtoA installation to fix the issue: dialog.py


  • Houdini 16 support (htoa#858)

  • Increase maximum IPR message size to 16MB (htoa#859)

  • Fix temporary hangs under Windows (core#5645)

  • Volumes missing IPR update when changing min and max parameters (core#5773)

  • Always scale past 64 threads in Windows (core#5759)

  • Write time message for .ass files too short (core#5743)

  • Watermarked deep file hangs render (core#5733)

  • face_visibility crash (core#5721)


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

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