Some pixels at the edge between cascaded shadow maps and distance field shadows can be skipped by both, leading to unshadowed pixels.
Licensee reports the bug happening in 5.3 as well. Test project is for 5.4.
1. Download the Licensee's test project and open https://udn.unrealengine.com/s/contentdocument/069QP000006zLPAYA2
2. Open level /Game/BugOutlineArtefact/BugOutlineArtefact
3. Set scalability to High (to activate distance field shadow)
4. Uncheck Show-> Anti-aliasing (to see the artifact better)
5. Move camera front and back. Observe the line in bright light at the transition of cascade shadow and distance field shadow
6. Run the command "vis ShadowMaskTexture UV2 R" to visualize the ShadowMaskTexture. Observe the unshadowed pixels.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-210854 in the post.
| 0 |
| Component | UE - Graphics Features |
|---|---|
| Affects Versions | 5.4 |
| Target Fix | 5.5 |
| Fix Commit | 32924212 |
|---|
| Created | Mar 28, 2024 |
|---|---|
| Resolved | Apr 12, 2024 |
| Updated | Aug 6, 2024 |