Launch Development Editor with -game -opengl and enable RHI thread.
When drawing shadows, the pixel shader may be null and will try to use FNullPS, and it will cause thread conflict. The call stack is under below.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-73121 in the post.
| 2 |
| Component | UE - Graphics Features |
|---|---|
| Affects Versions | 4.21.2 |
| Target Fix | 4.24 |
| Created | Apr 22, 2019 |
|---|---|
| Resolved | Sep 3, 2019 |
| Updated | Nov 27, 2019 |