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Release date: April 1922, 2022

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PxrSetRange: new pattern to remap signals using SeExpr's compress(), expand() and fit() functions.
PxrArithmetic now support supports many more functions, mirroring Blender's Math node.
PxrPhasorNoise: Added direction flow controls to align waves along the vector direction.
PxrVariable: fixing typos.
PxrRamp: Added a clamp parameter to keep output between 0 and 1.
Fixed typo in the argument to Dx() and Dy() in the non-manifold initTxCoords() OSL function. The typo caused incorrect t derivative in non-manifold OSL bump mapping when "invertT" is 1 (which is the default). The bump direction will change in images with OSL bump mapping and "invertT" 1 (which is the default) and the bump amount driven by a non-manifold input. The bump direction now matches the corresponding old C++ bump code and the manifold version of the same code.
Fixed a bug that could cause a crash when using OSL fmod() with differing variable types.
It is now possible to compile our patterns without HexTiling functionality by passing the PXR_HEXTILE_DISABLED define to oslc.

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Fixed a bug where deleting images that were being rendered to would crash "it"
Fixed stability issues when running live stats to the 'it' HUD.
The window could fail to resize (Ctrl-F) correctly with non-square pixels images.
XPU renders can now be canceled from the IT UI.
The Select Object and Surface tools Tools now work with XPU renders.
The Crop Tool now works with XPU renders.

Fixed a bug where file textures from material x networks would appear vertically flipped in RenderMan renders. The old behavior can be restored via the env var HD_PRMAN_MATERIALX_VERTICAL_FLIP=false.
Bail if we see a "multioutput" connection, since these aren't supported yet (Note, studio has added support, but involves a USD change that we're not using yet).
Fixed an issue for mtlx image files where the rtx plug-in gets referenced. The heuristic for grabbing the texture node ptr was sometimes failing.
Fixed an issue for tex files: resolve the path, because RenderMan doesn't know about usd file relative paths.
For mtlx image file nodes without a texcoord connection automatically wire in a mtlx geompropvalue specifying st texture coords.
Fixed a bug where toggling visibility of individual instances would lead to a crash.
Added support for PRMAN_OSL_BEFORE_RIXPLUGINS environment variable when running the RenderMan hydra delegate.

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The color manager now recognizes colorspace name embedded in filenames for lights and light filters, in the ACES and Filmic-Blender configs.
Presets can now be renamed in the preset browser, after they've been saved.
Added support for Maya 2023.

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