Unreal Engine Issues

Raytracing Material Border Artefacts

Download the licensee repro from here - [Link Removed] The issue should be immediately visible in editor, but if not, shrink the main viewport and it should become more prominent as you zoom into t ...

Soft Raytracing Shadows are flickering

[Image Removed][Link Removed] ...

SpiralBlur-SceneTexture Does Not Compile If Raytracing Enabled

The material function SpiralBlur-SceneTexture, does not compile in DX12 mode. Found in 4.22 CL# 7053642, 4.23 CL# 7321677, 4.24 CL #7474192 ...

Hidden Shadows Aren't Rendered When Raytracing Is Enabled

Hidden shadows aren't rendered when ray tracing is enabled. Found in 4.25 Preview 2 CL#12055273 Reproduced in 4.23.1 CL#9631420, 4.24.3 CL#11590370, 4.26 Main CL#12123513 ...

Raytraced Shadows don't render on landscape grass

Regression: Tested in UE5/Release-5.0, the issue did not occur so this is a regression Cast Dynamic Shadow should be enabled in the Landscape Grass Type by default, so shadows should be cast by the ...

RayTracing Final Gather is not working in UE 5.1

Further Comments: Customer is using the deprecated ray traced mode. ...

Random Scene Objects are not being rendered in Raytraced Reflections in packaging builds.

Each time the build is run, different assets are missing in the reflections. Found in 4.22 CL# 6574378 and 4.23 CL# 6925347 ...

Editor/Game Ensure hit with RayTracing enabled on AMD GPU

A Static Mesh asset will trigger an ensure when generating building the ray tracing acceleration structure on AMD GPUs. ...

Crash in editor when loading a procedural mesh that has multiple sections and raytracing is enabled

Crash when capturing attribute spreadsheet of Niagara GPU Particle with raytracing enabled

Also, NiagaraDebugger crashes the moment I enable GPU Particle Readback. ...