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• Fixed bugs batched trace() with multiple shader groups in the hits.

• Fixed a bug that could return garbage derivatives on failed texture lookups from OSL.

• Fixed a bug that could result in bad texture derivatives at UDIM boundaries.

• Fixed offscreen decimation of dicing rate incorrect behavior with a custom ScreenWindow

• Fixed out-of-bounds vector access when a osl spline is provided with only a single control point.

• fixed incorrect default for the number of textures in PxrTileManifold and PxrRandomTextureManifold.

• Fixed rare holes in alpha channel due to missing ray hits on subdivision surfaces with intricate detail. (The holes were visible when looking at the alpha channel with gamma=0.)

• Fixed a bug where derivatives where uninitalized when fetching uniform attributes and options with OSL getattribute().

•  PxrSwitch artefact when connecting a pattern to the index parameter.

Miscellaneous Changes

• improvements to light selection learning

• improve the behavior of denoised Marschner by changing how the albedo is calculated

• improve the degree of noise in scenes with spotlights or ies profiles

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