Since the last engine merge in FN Main, any mesh that silhouettes against DOF will produce a bright, halo like effect on the outside edge. The further away the background is from the silhouetted mesh, the more pronounced the effect.
From what I can tell, it is caused by a combination of temporal AA and Gaussian blur depth of field. When one or the other is turned off, the bright halo disappears. I've attached screen shots of those 3 scenarios.
Fixed and shiped large number of FNBR versions that uses Gaussian DOF fine.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-42119 in the post.
| 0 |
| Component | UE - Graphics Features |
|---|---|
| Target Fix | 4.20 |
| Fix Commit | 3512696 |
|---|---|
| Main Commit | 4042226 |
| Release Commit | 4095966 |
| Created | Feb 17, 2017 |
|---|---|
| Resolved | Jan 30, 2018 |
| Updated | May 31, 2018 |