The flowing lava in the level is a much lower quality than expected the poor quality does not appear to be caused by slow texture streaming, but instead by an over-exagerated or low quality motion blur.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-27455 in the post.
| 1 | 
| Component | UE - Graphics Features | 
|---|---|
| Affects Versions | 4.11 | 
| Created | Feb 25, 2016 | 
|---|---|
| Resolved | Aug 18, 2021 | 
| Updated | Aug 18, 2021 |