Unreal Engine Issues

Ray tracing shadows prohibit the subsurface color to show through the object

Ray tracing shadows prohibit the subsurface color to show through the object. ...

FD3D12BindlessResourceManager::GrowCPUHeap will cause GPU heap activation whether it's needed or not

The ctor of FD3D12BindlessResourceManager implies that GPU heap activation is intended to occur lazily with ERHIBindlessConfiguration::RayTracingShaders, however any call to FD3D12BindlessResourceMa ...

RT shadows break with a 16-bit GBuffer

Ray traced shadows are missing when the gbuffer is forced to 16-bit. ...

Path tracing gets harsh shading falloff if using area lights

Thumbnails do not display shadows after opening and saving the asset

Shadows in an asset's thumbnail disappear after opening and saving the asset, whether changes are made or not.  Tested: 4.24.3 CL#11590370, 4.25P6 CL#12493028, 4.26 CL#12767035 ...

Crash enabling Stochastic Rect Light with Ray Tracing

Enabling Stochastic Rect Lights with Ray Tracing causes the project to crash. Reported and tested in version 4.26.0(CL 14419252). Tested and not found in version 4.25.3(CL 13942748).  ...

Motion blur does not work with ray traced translucency enabled

Refraction of Ray Traced Translucency in Path Trace View is Incorrect

Refraction of Ray Traced Translucency in Path Trace View is Incorrect. Found in 4.22 CL# 5660361 and 4.23 CL# 5779284 ...

Memory leak when rendering some meshes with ray tracing enabled

This memory leak seems to be caused by the TMemStackAllocator of FRayTracingMeshCommandOneFrameArray. Using the FDefaultAllocator for FRayTracingMeshCommandOneFrameArray works as a workaround. // ...

Media Plate Actor becomes blacked out when set to Spawnable in a Level Sequencer

saving a media plate actor set to spawnable in a level sequence causes the media plate actor to become black. there are two known workarounds 1. toggling the Media plate to Possessable, and Spawnabl ...