I narrowed down the issue to the Main call of ShadowProjectionPixelShader, and tested (on 4.26 and 4.27) a combo of different material and light shadow settings, as well as enabling transmission on the light for the the SUBPIXEL_SHADOW enabled shaders, but couldn't get to the bottom of it.
Download the licensee repro here - [Link Removed]
The issue is immediately apparent.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-121788 in the post.
|Component||UE - Rendering|
|Affects Versions||4.26.2, 4.27|
|Created||Aug 17, 2021|
|Resolved||Oct 4, 2021|
|Updated||Oct 6, 2021|