HtoA 5.5.0.2 is a bug fix release using Arnold 6.1.0.1. It features Arnold-USD (1510b0fe).

Installation

  1. Download Arnold for Houdini

  2. Follow these installation instructions

    New Windows system requirement

    If you use the Extract contents only option to install HtoA, you must manually install the Microsoft Visual C++ 2015-2019 Redistributable.

    The VCRedist install is in the HtoA redist folder. For example:

    \\SERVER\htoa\htoa-5.5.0.0_r5b05c8c_houdini-18.5.351\htoa-5.5.0.0_r5b05c8c_houdini-18.5.351\redist\VC_redist.x64.exe

Autodesk Network Licensing in Arnold 6 requires new license files with an updated 2020 version. Please follow the instructions on this page to generate your license file. More info about Arnold 6 licensing can be found here.

 

System Requirements

  • Houdini, Houdini FX, Houdini Indie and Houdini Education
    • 17.5.460
    • 18.0.597
    • 18.5.408
    • 18.5.462
  • Windows 7 or later, with the Visual Studio 2019 redistributable.
  • Linux with at least glibc 2.12 and libstdc++ 3.4.13 (gcc 4.4.7). This is equivalent to RHEL/CentOS 6.
  • OSX 10.11 to 10.15. Note that macOS 11 Big Sur is not certified.
  • CPUs need to support the SSE4.1 instruction set.
  • GPU rendering works on Windows and Linux only and requires an NVIDIA GPU of the Turing, Volta, Pascal, or Maxwell architecture. We recommend using the 455.38 or higher drivers on Linux and 457.09 (Quadro), 457.30 (GeForce), or higher on Windows. See Getting Started with Arnold GPU for more information.
  • Optix™ denoiser requires an NVidia GPU with CUDA™ Compute Capability 5.0 and above.
 

Bug Fixes

  • htoa#1100 Update installer images
  • htoa#1582 Allow optional gpu_sparse_textures parameter
  • htoa#1586 Remove visible_light shader from vop context
  • htoa#1593 Remove insensitive terminology
  • htoa#1594 About box text is no longer truncated
  • htoa#1620 Pull alembic procedural frame rate from scene
  • htoa#1626 Volume shader is now assigned to all instanced procedurals

  • htoa#1627 Updated installer version

  • core#10125 Bad chromaticity detection when linear and narrow color space are the same
  • core#9979 Crash when missing config in color_manager_ocio
  • core#10140 Crash with quad_light and IPR
  • core#10050 [GPU] Crash in displacement in when using tracing shaders in the scene
  • core#10128 [GPU] Curvature shader slows down render
  • core#10060 [GPU] Improve handling of stack overflow exceptions
  • core#10118 [GPU] Improve NVML detection
  • core#10196 [GPU] Light disappears during GPU IPR after modification
  • core#9634 [GPU] OSL texture lookup crashing on a subsequent renders
  • core#10163 [GPU] Single channel float texture artifacts
  • core#10231 [GPU] Texture and exception handling errors using multiple GPUs without NVLink
  • core#10146 Hang in crash handler
  • core#10165 [OSL] Artifacts when using randomwalk_bssrdf in OSL
  • core#10159 Random crash in subdivision after render interruption
  • core#10124 Surfaces with transmission depth can disappear with nested dielectrics on CPU
  • usd#592 Invalid face-varying primvars crash the render delegate
  • usd#596 Invalid USD is produced if polymesh is made of triangles and nsides is empty
  • usd#481 std::string, TfToken, and SdfAssetPath typed VtArrays are not converted when setting primvars

 

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