UE 4.27 - Raytracing, shadow issues with RT shadows off

Pandemo
Tue, 28 Feb 2023 07:55:51 +0000
Rendering

Hi,

I’m trying to utilise RTXGI and raytraced AO for my project. Everything functions as expected including the issues with WPO foliage shadows. However I’m seeing some strange render issues with raytraced AO (I think)

With Raytracing on and raytraced shadows from my direct light source I have shadow issues using wpo foliage. When I place a mesh directly and tick adjust for wpo the issue goes away, but only at a certain draw distance.

Even if I disable raytraced shadows on all light sources the issue remains the same. Only way to get rid of it is to cull the shadows completely or untick cast RT shadows in the material, leaving me with no shadows at all, including a lack of AO.

I feel there must be a setting / command I’m missing since it works at a certain draw distance as shown in the video.

Camera is located above the pawn
X - 3100
Z +4600

Raytracing active - Raster shadows

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