Download the licensee repro from here - [Link Removed]
There are three issues on display:
Shadows under the spheres are blurred:
[Image Removed]
Cubemap darks after certain distance when HDRI backdrop size >=3000:
[Image Removed]
Reflections and lighting lost when HDRI backdrop size <= 410:
[Image Removed]
See linked UDN for further information.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-174893 in the post.
| 2 |
| Component | UE - Graphics Features - Lumen |
|---|---|
| Affects Versions | 5.1.1 |
| Target Fix | 5.8 |
| Created | Jan 24, 2023 |
|---|---|
| Updated | Oct 17, 2025 |