HtoA 1.8.1

25 October 2015

This is a bugfix release, with initial support for array parameters.

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

This release uses Arnold and OpenVDB 3.0.0.

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

  • 14.0.474
  • 14.0.444

and for the following platforms:

  • Linux x86_64 (gcc4.4 for H14, gcc4.8 for H15)
  • Windows 7 x64 (vc11)
  • Mac OS X 10.8+

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

  • Initial support for array parameters of shaders (htoa#276)
  • Search path splitting inconsistent between parameters and platforms (core#4897)

  • rays/pixel stat not outputting correct value when there were 0 rays/pixel (core#4898)

  • Rare numerical precision artifacts causing noisy bumpmapping (core#4911)

  • UDIM tile selection needs to handle bad barycentric coordinates (core#4914)

  • Incorrect render with matte surfaces behind volumes (core#4918)

  • Deep EXR: preserve float or RGB ID values when tolerance is zero (core#4921)

  • Hostname missing in the logs on some Linux distributions (core#4924)

  • Use existing .tx textures not working for lights (htoa#705)
  • space_transform should default to object space inside vector_displacement (htoa#706)
  • Crash when rendering instances with motion blur (htoa#708)
  • Update tutorials link to common workflows (htoa#675)
  • Wrongly merged indexed user data when more than one attribute is merged (htoa#711)


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


  • No labels