Thursday 23rd January


This is a bug fix release, fixing issues with IPR and batch rendering.


Please note the Houdini 18 builds do not include Solaris support, please see HtoA 5.0 instead.

Important information about Arnold GPU (beta)


  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:

  • 17.0.506
  • 17.5.460
  • 18.0.348

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.


  • Archive export session not always closing (htoa#1363)

  • HtoA running out of universes (htoa#1366)

  • Allow arbitrary IPR message size (htoa#1364)

  • Kill the hanging hick process remaining after a render restart (htoa#1324)
  • Restart render in IPR after shader parameter change when render is complete (htoa#1357)

  • Build psutil on OSX (htoa#1349)
  • OSX installer crashing on extraction (htoa#1352)


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


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