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  • Katana 4.5 support: KtoA supports the upcoming Katana version 4.5 release series. (KTOA-649)
  • ignore_imagers: this option has been added to ArnoldGlobalSettings to facilitate debugging and inspecting renders without any image post-processing applied. (KTOA-618)
  • Experimental import of Arnold data to the scenegraph: a new node ArnoldIn has been added with experimental support for importing any files Arnold understands such as .ass, USD, etc as Katana scenegraph. Currently this i geared towards materials import, but it will also import polymeshes and their material assignments. (KTOA-525, KTOA-673, KTOA-697)
    • Known issues:
      • Standalone materials are not imported (only shader networks assigned to a shape).
      • Some node naming schemes can confuse the Katana scenegraph, such as those generated by C4DtoA.
      • Not all node types are imported properly. For example, there is limited cameras support.
  • Live rendering changes for materials: many more changes to materials are properly updated in live rendering, such as changing shader network topology (adding/removing shader nodes) and changing material assignments to locations. Changes to "global" materials such as operators, imagers, AOV shaders and color manager may not update properly yet, but regular materials are updated properly. (KTOA-22)
  • Instancing performance is improved: instancing via pointcloud or instance array locations now has two fast paths that can be taken (even in combination): transformation fast path, which can happen if the instance source location(s) and the instance location have either simple or matching motion blur timings, and are not part of nested instancing. This speeds up the instancing by 2x. The other is the procedural fast path, which applies as long as the instance doesn't apply arbitrary data to specific sub-locations from the instance source. This scales much better, where complex instance source hierarchies don't cause a slowdown in instancing, and in many existing scenes gives a substantial speedup, potentially many times faster depending on the complexity of the hierarchy underneath the instance source locations. (KTOA-617)
  • Multiple outputs for shaders: these are fully supported in the Katana scenegraph, and will particularly be helpful for both on-disk and inline OSL shaders. (KTOA-652, KTOA-669)
  • OIDN denoiser support: the OIDN denoiser can be accessed via an imager shader, for now. It is not yet available in the ArnoldDenoise node in Katana. (KTOA-634, KTOA-663, KTOA-718)
  • OCIO support and configuration files: KtoA includes and uses by default the OpenColorIO configuration files provided by Arnold core. (KTOA-658, KTOA-667, KTOA-688)
  • Scene units: the meters_per_unit option has been added to ArnoldGlobalSettings to indicate the scene unit size. When using standins (.ass procedurals) with units information, they will be auto-scaled to the units specified in the global settings. (KTOA-657, KTOA-704)
  • Multipart EXR support: multi-part EXRs can be generated by turning on the option for a given output in an ArnoldOutputChannelDefine node. Generally, this won't make any difference , unless light group AOVs are being exported to the EXR (which settings are also accessible on ArnoldOutputChannelDefine). Note that disk denoising (using noiceNoice) is incompatible with multi-part EXRs. (KTOA-622)
  • imager_color_curves: this new imager is supported, created as a material and assigned like other imagers to the driver in an ArnoldOutputChannelDefine node. (KTOA-640, KTOA-719)
  • use_existing_tx: this option was added to ArnoldGlobalSettings, where Arnold will pick up any existing .tx files that live next to and correspond to a non-tx file specified as a texture in the image node. (KTOA-690)
  • Scene update script: the scene update shelf script UpdateArnoldNodes has been itself updated to help handle Katana node and parameter changes for Arnold 7.0 and KtoA 4.0. (KTOA-698)

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