Fixed possible banding artifacts on normals generated for quads when using Displace Along Normal or Mtlx Heighttonormal VOPs in a surface shader.

Fixed issue with shader dependency tracking when using a Mtlx Usd Primvar reader VOP.

Fixed and updated the docs for these MaterialX nodes, which were incorrectly marked as unsupported by Karma: mtlxburn, mtlxdifference, mtlxdisjointover, mtlxdodge, mtlxin, mtlxinside, mtlxmask, mtlxmatte, mtlxminus, mtlxmix, mtlxout, mtlxoutside, mtlxover, mtlxoverlay, mtlxplus, mtlxpremult, mtlxscreen, mtlxunpremult

Fixed blown out specular when applying Mtlx standard surface on oriented curves.

Fixed a bug with the Mtlx Transform node in Karma CPU.

XPU: mtlx_swizzle now behaves exactly like it does in KarmaCPU

XPU: roughness clamping now works with MtlxStandardSurface, as well as USDPreviewSurface transmission

The mtlx2karma.py script should be more robust when importing custom MaterialX node graphs for use with Karma.

Improved performance of texture calls for Mtlx and Usd Preview shaders in Karma.

MaterialX VOPs now use menu parameters for shader inputs that have enumerated values in the .mtlx specification documents.

Fixes an issue with the Material Variation LOP with newly added types which were previously unsupported (image, float2, double2, texCoord2f, texCoord2d, color4f and color4d) Adds an option to author primvars as scalar attributes instead of arrays of length 1 when the primvar interpolation is constant. Adds support in the name parm menu for bound Mtlx Geometry Property Value and Mtlx Geometry Color shaders.

Fixed issue with Mtlx subtract operator for color4 types.

The MaterialX vops have a RMB > Save > MaterialX... menu entry to save the shader network to .mtlx files.

Ensure that the mtlx2karma.py Pythons script is distributed. This allows karma to recognize custom MaterialX node graph operators.

Added MtlX AOV VOP. Simplifies marking shader signals for Render Vars in MaterialX shading graphs.

Add MtlX ramp support for cubic and linear float/color ramps

Fixed issue where channel metadata in mtlx nodes was not handled by Karma

MaterialX node label prefix changed from 'Mtlx' to 'MtlX', which improves the experience of finding MaterialX nodes in the tab menu.

'MaterialX Subnet' tool added to filter for only MtlX-compatible VOPs. Also added a 'Karma MaterialX Subnet' tool, which masks the tab menu for MaterialX and non-VEX nodes, compatible with Karma and Karma XPU.

Special handing of Mtlx Surface Material VOP, which is equivalent to a Collect VOP for MaterialX (ie, it represents a material; not a shader).

XPU: rayimport via the MtlxDot node

The Mtlx normal node now returns the front-faced normal rather than the raw normal.

The Mtlx Fake Caustics VOP will now work if it's used with the Usd Preview shader.

Fixed a bug where Mtlx Normalmap was using incorrect tangent space. Mtlx Tangent and Bitangent nodes now compute tangents based on UV (if the uv attribute exists) instead of simply returning primitive dPds and dPdt.

Added a mtlxfakecaustics VOP node to implement fake caustics in MaterialX materials. This only works for Karma CPU. Please see help for details.