...
Fixes
Fixed a bug where displacement and volume shaders initialization would happen too late (i.e. after displacement and/or dicing)
- Added PxrSurface "glassRefractionRoughness" parameter also to PxrLayerMixer OSL shader
- Prman would crash with the PxrProjector node if a coordinate system was not provided
- Avoid deadlock when user plug-ins throw exceptions. Please note that all user plug-ins are expected to catch their own exceptions
- Fix intermittent baking crash with subdivision meshes
- Fixed a bug where uniform primvars of Subdiv and Poly meshes could return uninitialzed derivatives
- Fix memory leak of framebuffer data when baking
- Fixed a bug that could cause unrelated lights across a scene to randomly flicker when using a GOBO on any light
- Fixed artefacts in PxrTangentField. The is a new "int backwardCompatible" parameter should you prefer the old behavior
- Fix color array, matrix, and matrix array parameters with the python bindings
- Fixed a bug where scenes with very high light counts could sometimes get stuck for a long period of time during initial scene processing
- Fix incorrect varying quadric privmar length in scene graph API
- PxrNormalMap, PxrBump: Fixed a rare crash when a misconfigured connected pattern fails to deliver the surface normal for bump layering
Miscellaneous Changes
- Robustified replacing Pixar formatted textures on disk during live renders
- The precision of OSL transforms from current to arbitrary spaces has been improved
- Threading performance for the tessellation of dense displaced poly and subdiv meshes has been improved
- We now invalidate curves clusters (if needed) after group flattening, before building the reference instances
Known Limitations
Interactive/Live Rendering Limitations
- Bucket order or size cannot be changed during live rendering
- Changes to Presence do not update when using the opacity cache option
- Motion Blur will disappear during interactive rendering with scene changes
- Objects are not re-diced during interactive camera edits
- Mesh lights cannot be interchanged as geometry without restart.
RenderMan Pro Server
- PxrUnified integrator is currently experimental as it does not yet support all the standard rendering features.
- Meshlights cannot be instanced
- Load on demand procedurals are not supported anymore, all procedurals are now loaded immediately
- We do not read point data from OpenVDB files
- PxrSurface back diffuse color is not output to the albedo color AOV
- Analytical lights placed inside volumes may yield artifacts when made visible to the camera. As a work around, the light camera visibility should be turned off, and a geometry with a similar shape should be used (visible to camera, invisible to transmission and indirect rays), with the proper emissive bxdf.
- Using the ' . ' character in the handle for an OSL shader could cause unpredictable results during re-rendering.
- Per-Instance baking is not supported, only the reference instance.
- 3d baking: no direct bake-to-ptex support.
- PxrBakePointCloud cannot directly render ptex.
- Sample/Display filter plug-ins do not have access to lighting services for light dependent effects, e.g. lens flare.
- Adding new mesh light on existing geometry during IPR results in double geometry.
- Motion blurred polygons do not motion blur normals when deformed. Use Subdivision meshes instead.
- When attempting to access an array primvar, you must first check the size of the array primvar and allocate the appropriate space. Not doing so may lead to a crash.
- Points and curves cannot be used as geometric lights.
Deformation motion blurred volumes don't currently work with densityFloatPrimVar or densityColorPrimVar. You will need to use a PxrPrimVar node connected to densityFloat and densityColor instead.
...