Features:

• Adds the ability to rotate DDGIVolumes.
• Updates UE4 Plugin patch files.

Bug Fixes:

• Fixes a control flow issue in the probe classification compute shader that stops back face hits from being treated as front faces hits.
• Fixes a compilation issue on non-windows platforms.
• Fixes an issue with perfect diffuse reflectors. Adds a BRDF absorption factor since perfect diffuse reflectors don't exist in the real world!
• Fixes a color shift issue. Swaps packed irradiance textures to R10G10B10 format. Using 10-bits for all channels prevents numerical precision differences from causing discoloration artifacts in some cases.
• Fixes a numerical precision issue preventing radiance from reaching black when using 10-bit texture formats (in some cases).
• Fixes an issue where inactive probes were contributing to indirect lighting.

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Features:

• Increased the number of volumes supported in the indirect lighting pass from 6 to 12.
• Screen-space indirect lighting resolution is now adjustable through cvars.
• Support blending of more than 2 volumes.
• Extended Blueprint functionality to enable control of DDGIVolume properties at runtime.
• Added a button to the DDGIVolume component that clears all probe data for the volume.
• Added new UI settings for volume probe visualization. Includes options for the different visualization modes (Irradiance, Hit Distance, etc).
• Added an option to the RTXGI project settings to enable / disable DDGIVolume serialization (storing volume data to disk).
• Improved the RTXGI Editor UI in a number of places. Updated and improved UI tooltips.

Bug Fixes:

• Fixed several resource barrier and transition issues (PC and console).
• Fixed incorrect sRGB conversion when loading GBuffer data in the ApplyLighting pass.
• Fixed compilation issues when ray tracing is disabled.
• Fixed compilation issues for Linux / Vulkan compilation.
• Fixed an issue where DDGIVolumes with the infinite scroll option enabled incorrectly applied the parent actor's rotation transform to the volume.
• Fixed an issue where DDGIVolumes with the infinite scroll option enabled would not clear probe data from scrolled probes on movement.
• Fixed an issue where DDGIVolumes with the infinite scroll option *disabled* would be black when another DDGIVolume in the scene had this option enabled.