Chaos V-Ray 7, Update 1 (7.10.00) for Houdini

V-Ray
- Add a cylindrical camera type with manual vertical FOV control.
Volumes
- Support for indexing VDB fields by index instead of name.
- Support for "live" volume data with the new Volume Shader in "vanilla" Houdini and Solaris.
- Support for motion blur with undersampled velocity with the new volume shader.
- Add Solaris export for velocity channel for motion blur with the new volume shader.
Houdini
- Add support for 20.5.522.
- Add support for 20.5.550.
- Add support for 20.5.584.
Houdini 20.5
- Add support for OCIO version 2.3.
Solaris
- Add support for Sun Geographic Position.
- Add support for EXR metadata from Husk.
- Add support for Aerial Perspective.
- Add support for half-float buffers.
- Add Chaos Cloud support for Solaris.
- Add support for V-Ray Decal.
- Rename Beauty to rgba in the V-Ray Standard Render Vars LOP.
MaterialX
- Added support for View Direction VOP.
- Add support for choosing an EXR layer to load for textures.
USD
- Render settings primitive support.
- Add V-Ray 7 for USD nightly builds.

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V-Ray
- Add environment variable override for the resumable rendering sidecar file location on disk.
- Ignore Motion Blur Interval Center and Duration for Velocity AOV.
- Port overscan setup from V-Ray for Maya for 'vanilla' Houdini.
Cosmos
- Expand cosmos asset file paths by default to simplify farm rendering setup.
- Imported materials will now use the V-Ray Image File VOP to reduce node clutter.
MaterialX
- Optimize node graph texture plugin sampling.
- Fix and provide manual implementations for the rest of the non-nodegraph MaterialX nodes.
UI
- Add a checkbox to flip 180 degrees for the V-Ray Gaussian Splats GUI.
- Rename Layered Texture "None" mode to "Normal".
- Disable "Self Illumination Affects GI" and set Opacity Source to "Colored" for the V-Ray Material default settings.

V-Ray
- Extremely slow rendering when a volumes has an empty channel.
- Crash with OpenEXR on Linux.
- Hole in alpha with agent primitive when using dynamic geometry and primary visibility is disabled.
- Hang on render start with a particular Alembic file and displacement assigned to it.
- VFB Undo and Redo are not working properly when there is a Background layer.
- Instanced subnets rendered differently on Linux.
- ${TMP}/vfh/history for VFB History folder does not work as expected.
- VFB settings window falls behind Houdini window on Linux.
- IES Light Shape values does not affect the Light nor the Render.
- Add new PRG model and Altitude parameter for Sky texture.
Solaris
- Lights instanced in Reference Mode on Instancer doesn't hide original prototype.
- No effect for Camera Type parameter under Render Settings LOP.
- No motion blur for volumes when using float velocity fields.
- Volumes disappear when switching Display flag to Instancer LOP scattering volume primitives.
- Volumes disappear when making changes to the stage graph.
- Native volumes are missing from the render when using Husk.
- Native Houdini volumes don't work with new volume shader.
- Vector fields do not work as expected with the new volume shader.
- Instancer primvars should not override prototype primvars.
- Crash or nothing rendered with particular setup on GPU.
- VDB Volumes dissappear when changing frame index during rendering.
- OSL camera shaders do not work.
- Incomplete primvar types / interpolations.
- Dome Light - multiply color temperature by texture.
- Dome Light - flip default state of "Invisible" parameter.
- Crash when modifying SOP geometry/attributes for particles.
- "Render as Smooth Curves" toggle is not updated in viewport IPR.
- No IPR update for Aerial Perspective when rotating the linked V-Ray Sun LOP.
- V-Ray Light Material applied to curves will cause a hang/lock of the viewport.
- Add support for cubic curves in order to match the Karma result with the feather procedural.
- Memory leak during IPR with instancing.
- Instanced volumes missing from husk/production rendering due to specific parameter export.
- Missing "lpe_label" parameter export for Light material when "Direct Illumination" is enabled.
- Remove "Add CPU Device" toggle on Render Settings LOP in favor of "Device Select" window.
- Crash when bypassing Aerial Perspective node with V-Ray IPR active.
- Cubic catmullrom periodic curve rendered wrong.
- No updates for V-Ray Material Bump Map and Normal Map textures.
- Display Options menu not showing "Render Device".
- Gradient Ramp texture has stopped working.
- Wrong uvwgen plugin is exported for procedural textures.
- Crash when connecting an Image File node.
- Error message when creating a Volume Grid shader inside Material Library LOP.
- Instances go missing randomly with specific scene.
- Unplugging a texture from the V-Ray Material "bump_map" input does not update result in IPR.
- Crash when trying to import enmesh asset from cosmos.
- Background texture not used for husk.
- Wrong render settings are used for render.
- Velocity AOV affects objects position.
- Crash when assigning a material to polygons in specific scene while V-Ray is running.
- Adding a cryptomatte element breaks all aovs.
- Wrong export for Background Plate LOP.
- Instances take a long time to compile the scene and a lot of memory to render.
- primvar priority is wrong for instanceable prims.
- Transform samples are ingored if velocity blur is activated.
- Can't render animation with Karma if V-Ray is installed.
- Crash when changing instances count during viewport IPR.
- Wrong fog_color and fog_mult values exported for V-Ray material translucency parameters.
- Wrong gamma when Beauty aov is selected from V-Ray Standard Render Vars LOP.
- V-Ray light filter has stopped working.
USD
- Point creases are ignored.
- V-Ray Physical Camera's "Focal Length" produces unexpected results above a value of 500.
- Fixed some differences between V-Ray Standalone USD rendering and Solaris.
- Transparent object renders black in Standalone.
- Holdouts on instances doesn't work in Standalone.
- Half-float primvars support.
- V-Ray Hydra delegate refuses to start with a EULA error when calling UsdView through Hython.
- Light links are ignored in Standalone.
- Incorrect Shading with Rectangular Area Light and Spotlight Shaping.
MaterialX
- Different results when importing certain .mtlx file from MtlVRmat and directly importing from Houdini.
- NaN pixel values for specific material setup with mapped normals.
- Normal map is handled wrong in some cases.
- Fractal3D is not generating vector noise when the signature is vector.
- Crash with some mtlx scenes on Linux.
- Normal Map VOP produces incorrect results.
- Using "Mix" VOP with a Standard Surface with Opacity < 1.0 produces unexpected results.
- Crash when switching Image File type from color to float when used as displacement.
- Standard Surface specular anisotropy direction different than Karma and issue when value set to 0.
- Image file textures not uploaded to Chaos Cloud.
GPU
- Add support for cryptomatte by Material Path.
- Alembic particles attributes not working.
- Shader Attributes on Alembic Geometry do not render.
- V-Ray Object Properties "Primary Visibility" has no effect for Hair when rendering in RTX mode for the GPU.
- V-Ray Object Properties are ignored for Hair when Velocity Motion Blur is enabled for CUDA.
- Missing geometry when MB is on with physical camera.
- Hair sampler crash.
- Incorrect Motion Blur for Alembic.
- Subsets material is not rendered for instances.
- Alembic map channels are not rendered.
- V-Ray Object properties have no effect for hair/splines.
- PatternID texture has stopped working in V-Ray 7 builds.
- Attributes with motion blur on not working with RTX.
IPR
- Changes to "Override Camera Resolution" option on the Renderer ROP no longer cause an update.
- Cryptomatte is not available in the VFB channels list.
- Displacement not updated when applied on instances.
- Polygon render region updates are unpredictable.
- Changes made in a Take during IPR are not stored at all.
- No update when RGB Primaries are changed.
- Crash with instanced volumes when transforming the template points.
Textures
- V-Ray Bercon Grad texture renders differently in headless/batch mode.
- Normal map is inverted on one of the axes when used with triplanar and remap textures.
- V-Ray Bercon Distortion does not save dist_map connections.
- Added support for sampling UV channels by name for the UVW Bercon projection.
Materials
- V-Ray Decal has stopped working for non-alembic geometry.
- Default V-Ray Material's "Sheen Amount" to 1.
UI
- Auto White Balance Sample Accumulation Mode must be a menu.
- V-Ray Physical Camera's "Camera Shader Texture" parameter should expect an OSL file instead of a Bitmap file.
- Do not disable Density parameter when input density_tex is connected and default it to higher value for the new Volume Shader.