Disabling Shadow Denoiser causes raytraced shadows from Rect Lights to disappear

Rendering - Ray Tracing - Nov 6, 2020

Disabling Shadow Denoiser causes raytraced shadows from Rect Lights to disappear ...

Raytraced reflection doesn't work with high roughness

Rendering - Ray Tracing - Oct 30, 2020

Even when the max roughness for raytraced reflections is set to 1, they seem to be blended away at far below that value. For projects (e.g. film,vfx) where quality trumps speed it would be valuable ...

Back-face culling not working when translucency is set to Ray Tracing

Rendering - Ray Tracing - Oct 23, 2020

While enabling Ray Tracing from the start of the project, when user sets GlobalPostProcess Translucency to Ray Tracing, the back-face of the plane is not culled. However, when the translucency is se ...

Ray Tracing Translucency - Sample settings have no effect

Rendering - Ray Tracing - Oct 15, 2020

Ray tracing translucency samples per pixel settings have no visible effect.  Reported and tested in version 4.25.3(CL 13942748). Tested and found in versions 4.25.3 and 4.26.0 Preview 2(CL 14419252 ...

Ray traced shadows appear even after the mesh is hidden

Rendering - Ray Tracing - Oct 13, 2020

bCastHiddenShadow flag in UPrimitiveComponent doesn't affect ray tracing shadows ...

Crash enabling Stochastic Rect Light with Ray Tracing

Rendering - Ray Tracing - Oct 13, 2020

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).  ...

Lighting channels not working as expected when enabling Ray Tracing Shadow

Rendering - Ray Tracing - Oct 13, 2020

Non-Ray Tracing Shadows are only cast from lights on meshes assigned to the same Lighting Channel. When enabling Ray Tracing Shadows this is not the case. Lights will still cast Ray Tracing Shadows ...

Depth of field issues on Translucent Materials with Raytracing and DirectX12 enabled

Rendering - Ray Tracing - Oct 9, 2020

With DirectX12 and Raytracing enabled, translucent materials are not showing the correct depth of field.  Reported in version 4.25.3(CL 13942748). Tested and found in versions 4.25.3 and 4.24.3(C ...

Ray traced shadow sample settings greater than 1 cause shadow artifacts

Rendering - Ray Tracing - Sep 23, 2020

Alternative you can follow these steps to reproduce 1. Create a new project with ray tracing enabled 2. Activate the groom plugins 3. Import a groom asset into the scene 4. Add any light type to the ...

Crash occurs when RayTracing.ExcludeDecals is enabled

Rendering - Ray Tracing - Sep 16, 2020

The cause of the crash is out-of-range access to the array. ExcludeDecals eliminates the mesh instance to which the decal material is assigned, but it seems that the MeshCommand has been registered ...