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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
  • 17.0.506
  • 17.5.258229
  • 17.5.229
  • 258

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.


  • IPR for light color shaders (htoa#942)

  • OBJ node with tesselated and non-tesselated geo (htoa#1219)

  • IPR for light enable/disable parameter (htoa#1221)

  • Callback issue with Arnold ROP OTL (htoa#1222)

  • Arnold visibility override uses OBJ phantom status (htoa#1224)

  • Add use_implicit_uvs to ramp_float (htoa#1225)

  • Add wrap_uvs to ramp shaders (htoa#1227)

  • Add clamp parameter in uv_projection (htoa#1230)

  • Fixed link warning using shader for skydome_light (#1231)

  • Alembic geometry loses shader connections on frame changed (htoa#1233)

  • Fixed a slowdown in the cooker with many operators (core#8274)

  • Faster GPU cache pre-population (core#8229, core#8235, core#8241)


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


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