Translucent particle systems exhibit visual artifacts when the camera moves, even though motion vectors are disabled for the particle emitters.
While switching the Translucency Pass to "After Motion Blur" can help reduce the artifacts, the licensee does not prefer this workaround because it introduces sorting issues with other translucent elements in their scene.
This issue has been reproduced in UE 5.5, 5.6 and Main at CL 44028075.
Repro project in UE 5.6 has beeh shared.
1. Open the attached project in UE 5.6
2. Press play (PIE)
3. Rotate the camera around
4. Observe the artifacts generated around the translucent particles
Niagara System and Material are placed under Content/ThirdPerson
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-306682 in the post.
| 0 |
| Component | UE - Rendering Architecture |
|---|---|
| Affects Versions | 5.5, 5.6, 5.7 |
| Created | Jul 23, 2025 |
|---|---|
| Updated | Sep 11, 2025 |