Hey everyone, “happy” to see I’m not alone.
Have same issue described right here
What I have investigated so far:
-
It’s about combo of Raytraced shadows + Virtual shadow maps/Shader Model 6 + UE5.1. On 5.0.3 everything works fine with SM5 and SM6
-
For some reason virtual shadow maps work fine with SM5 in 5.0.3, but refuse to work with SM5 in 5.1.
-
It’s not about light type as you mentioned, but about light radius. If you will take point light and increase it’s radius from 0 it will create same issue.
-
Looks like it’s related to AMD GPU, since we all have it (mine is RX6600, drivers 22.11.2)
-
TEMP FIX: If in UE5.1 you will turn off SM6, turn on SM5, turn off virtual shadow maps and turn on Raytraced shadows - issue will be gone. I wonder it will loose in quality with such settings? (how do I get rid of this noise in the shadows?):
At this point I’m wondering if there is any point in using 5.1? 5.0.3 should provide nearly same lightning quality options without this issues, right? I wish we could tag a UE developer here somehow, because it’s clearly AMD/UE bug.