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 ...

Crash occur when switching the Ray Tracing shadow function when only shadow is enabled in the Ray Tracing

Rendering - Ray Tracing - Sep 16, 2020

According to the licensee, this problem is caused by a variable inconsistency in Cvar. The cause seems to be the difference between the CVar reference when generating RayTracingSceneRHI and the CVa ...

Static lighting isn't bouncing when using Layered Materials

Rendering - Ray Tracing - Aug 13, 2020

Static lighting will not bounce on the ceiling when using a Layered Material. The Material Attributes Layers node is used which doesn't appear in 4.24.3 so this isn't a regression. This was report ...

Reflection captures cannot capture any ray tracing effects

Rendering - Ray Tracing - Aug 4, 2020

Currently, Reflection capture ignore any ray tracing effects. So let'say you want to use only ray tracing shadow but also you want to use reflection captures for reflections instead of ray tracing r ...