HtoA 1.5.4

6 July 2015

This is a bugfix release, with improvements to the Mix shader and lots of bug fixes.

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

This release uses Arnold 4.2.7.5 and OpenVDB 3.0.0.

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

  • 14.0.361
  • 14.0.335
  • 14.0.291

and for the following platforms:

  • Linux x86_64 (gcc4.4)
  • 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.

Enhancements
  • New Facing Ratio shader that is visible in secondary rays (htoa#574)
  • Changing the texture of a light now correctly updates in IPR (htoa#469)
  • New refresh button on light texture to update a texture whose contents have changed on disk (htoa#469)
  • New functions in the htoa.ipr Python module allowing user controlled refresh or update of textures that trigger IPR re-renders (htoa#469)
  • Improved Mix shader performance by up to 2.9x (htoa#632)
  • The Mix shader now also mixes the built-in AOVs and up to 16 custom AOVs of type RGB (htoa#632)
Fixes
  • Incorrect transformation for lights in motion blurred procedurals (core#4737)

  • Built-in surface AOVs disappear inside atmosphere shader (core#4744)
  • Single channel alpha mismatch in deep driver for volumes (core#4746)
  • BVH motion count in stats is wrong (core#4753)
  • Occasional crash when curves generate invalid normals (core#4763)
  • Fixed ray differentials in free mode (core#4768)
  • Renaming output in kick fails when a camera is specified in the output (core#4749)
  • Removed false positive error messages about enable_procedural_cache (htoa#609)

  • Fixed export of multiple custom cameras referencing the same camera shader (htoa#617)

  • Fixed crash when instancing objects with more than one Arnold primitive type (htoa#611)
  • Fixed default shader help link (htoa#620)
  • Fixed order of Invert and Convert to Signed options in Space Transform shader (htoa#624)
  • Fixed regression causing a crash when translating constant user data on a custom Procedural OBJ digital asset (htoa#627)
  • Fixed volume shader assignment on procedurals (htoa#629)
  • Fixed some parameters of the Vector Displacement and Normal Map VOP digital assets not updating in IPR (htoa#628)
  • Dynamically load metadata for custom cameras to avoid "Parameter not found" error messages (htoa#619)
  • Cache metadata location for faster updates, especially over NFS (htoa#619)
  • Fixed hung hick processes left running in the background (htoa#576)
  • Fixed crash with deformation motion blur and merge vertex indices enabled (htoa#623)
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