BxDFs: Fixed the potential for NaNs when using the fuzz lobe of PxrSurface.Shading: Fixed a known look difference between CPU and GPU portions of XPU.macOS: Don't crash on Macs with AVX512 instruction set support.Rendering: Add support for FloatVectorAttribute when setting metadata for EXR output.Rendering: Fixed an issue that if you edited the shutter value, the framing and sampling unexpectedly changed.Checkpointing: When using the new variance metric, fixed a problem that prevented resuming from a checkpoint.Previously indirect visibility was only checked at volume interfaces, which meant that surfaces within volumes that also enclosed the camera could wrongly reflect indirect invisible volumes Volumes: indirect visibility of volumes now correctly takes into account scattering events that occur within the volume.Geometry: Fixed a memory leak for the case of general polygons which also occurred for pretessellated subdivision surfaces.Alembic: Fix for incorrect renders that could show up with polygonal input data with normals.OSL: Fix out-of-bounds vector access when a spline is provided with only a single control point.OSL: Improved OSL metadata tokenization to correctly handle.OSL: Silenced a debug message that was slowing down regex_search().BxDFs: Added labels for glass parameters to PxrLayerSurface to match PxrSurface: Shading Tangent, Manifold Walk IOR, and Anisotropy.Integrators: A crash in the Path Guiding feature of PxrUnified has been fixed.Lighting: Fixed a live render bug where the ramp would render backwards initially if begin > end.Lighting: Several fixes related to light selection.Lighting: Fix equiangular clipping in presence of infinite lights.Textures: Fixed a bug where txmake would fail on images whose largest mip layer is 4Gb or larger.Statistics: Better robustness during startup of the stats system.Curves: Fixed a crash when a very large amount of curves are present in a scene.Triplanar Scale: XYZ scales for triplanar projections at object/shader level.Hatching Mask control at object/shader level.Cam Depth Scale at object/shader level for all features in Lines & Hatching that rely on camera distance.Hatching Mask (set in PxrStylizedControl) to mask Hatching ON/OFF per object/shader.
Support custom surface normal coordinates for blended triplanar (ex: _Nref).Daisy Chain Comp Modes: Over, Plus, Multiply.Master Line Thickness & Line Thickness Scaling.New feature: Dilate + Sort for signals going off geo.Statistics: More stats from XPU's lighting subsystem are now available in the JSON report.Rendering: Add support for computing curvature on polymesh/subdiv/curve/point geometry.Rendering: Crop Window support is now available on XPU.Statistics: More stats are available in the JSON report.The supported ray types are "camera", "shadow", "reflection", "refraction", "diffuse", "glossy", "subsurface", and "displacement" Path Guiding is currently incompatible with integrator settings with more than one indirect sample, and with PxrPathTracer's 'manual' bxdf sampling mode. It can be activated in PxrPathTracer and the PxrUnified integrator via the new risGuiding integer parameter. Integrators: Added support for Path Guiding.Lights: Light shaders now have the ability to opt into multiscattering approximation calculations for the new aggregate volume feature Volumes: Adding additional new parameters to impl_openvdb: densityScale, densityRolloff, filterWidth, velocityScale.This is more efficient than reading the velocity via a PxrPrimvar or PxrVariable pattern Volumes: PxrVolume has a new velocityPrimVar parameter.See details here: Aggregate Volumes and in the DCC specific documentation sections. It also allows PxrSurface to use a heterogeneous volume in its interior integrator. Aggregate Volumes is a new technique allowing you to render overlapping volumes more efficiently and lower the time to first pixel. Volumes: PxrPathTracer now supports "Aggregate Volumes".hdPrman: Consume MaterialX through hdPrman.
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