v1.2.0

SDK

Features and Improvements

• Substantial code and API refactor
• Added support for Vulkan
• Added support for Linux (x86 and ARM)
• Added support for bindless resource access models
• Infinite Scrolling Volumes (ISV) feature is now available (no longer beta)
• Improved multi-volume support, including GPU workload batching
• Improved shaders with define driven feature and resource declarations
  • Shaders can now be used directly in any codebase that supports D3D12 or Vulkan, regardless of resource binding model
• Improved Probe Classification accuracy and increased performance gains when classification is enabled
• Moved DDGIVolume constants to structured buffer(s)
• Reduced the size of DDGIVolume constants by 2x
• Merged per-probe relocation and classification data into a single texture resource
  • Removed the R8 UINT texture resource used with classification
• Substantial CMake and build system improvements
  • Removed unnecessary third party dependencies
  • Refactored and simplified the defines system
• Refreshed and improved documentation and converted to Markdown

Bug Fixes

• Infinite scrolling volumes now properly clear irradiance and distance data for probes that are scrolled
• Probe classification now accurately tests each probe ray's hit distance against the probe voxel's bounding planes
• Fixed probe rays no longer perform unnecessary shading and lighting
• Fixed regression related to distance blending and sampling

Test Harness

Features and Improvements

• Substantial code redesign and overhaul
• Added support for Vulkan
• Added support for Linux (x86 and ARM)
• Added support for a bindless resource access in all shaders
• Added support for compressing textures to BC7 format on the CPU or GPU (using DirectXTex)
• Added support for creating texture mipmaps (using DirectXTex)
• Added support for using BC7 compressed textures on the GPU
• Added support for using mipmapped textures on the GPU
• Added support for an arbitrary number of lights
• Added hot shader reloading
• Added primary ray texture level of detail with ray differentials
• Added a binary scene cache system for fast runtime scene loading
• Added cross-platform windowing and input with GLFW
• Added CPU and GPU timestamp instrumentation
• Moved RTXGI DDGI indirect lighting pass to compute
• All GPU resources moved off of the upload heap to the device (default heap)
• Substantial CMake and build system improvements
  • Third party dependencies now included as proper Git Submodules
  • DXC binaries now delivered through packman
  • Refactored and simplified defines system
• Added new "Tunnel" and "Cornell Boxes" test scenes
• Refreshed and improved the configuration file system
• Refreshed and improved UI

Bug Fixes

• Fixed vsync and fullscreen crashing issues

v1.1.40

UE4 Plugin:

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.

v1.1.31

UE4 Plugin:

• Removes erroneous sRGBToLinear function call when loading GBuffer BaseColor in ApplyLightingDeferred.usf
• Bumps UE4 plugin version number to reflect the GBuffer sRGB fix.

v1.1.30

SDK:

• Adds the ability to rotate DDGIVolumes.
• Adds a control flow fix in the probe classification compute shader that stops back face hits from being treated as front faces hits.
• Adds changes that fix compilation errors on non-windows platforms.

UE4 Plugin:

• Updates host and shader code to match SDK v1.1.30.
• Updates engine-to-plugin interface and delegate callbacks. Use r.GlobalIllumination.ExperimentalPlugin [0|1] to enable or disable the plugin from the engine side.
• Adds the ability to rotate DDGIVolumes in the editor and in-game.
• Adds the ability to enable or disable individual DDGIVolumes in the editor and in-game.
• Adds several improvements for infinite scrolling volumes.
• Adds a GPU stat for RTXGI visualization passes.
• Adds a fix for resource transition issues.
• Adds a fix for RTXGI not running in shipping builds.
• Adds a fix for RTXGI running even when r.RayTracing.ForceRayTracingEffects=0.
• Adds fixes for compilation errors on non-windows platforms.
• Vulkan: adds a fix for loaded DDGIVolume textures not being copied to the GPU.
• Vulkan: adds a fix for a crash on shutdown.