Context: this report comes from a RenderFuzz-based UE 5.5 rendering anomaly study. I am posting the issue publicly so other Unreal Engine developers can check whether it is reproducible, already known, or has a practical workaround.
I have a repeated UE 5.5 issue where decals or decal-like wall markings pop in and out during camera movement.
Repro setup:
- UE 5.5 on Windows.
- Decal test map, for example TestMap_015.
- Renderer settings from conditions.json.
- Translate or pulse-translate the camera while the decal-marked surface stays visible.
Observed result:
The decal markings abruptly disappear, reappear, or change coverage during camera movement.
Expected result:
Decals should remain visible and stable while the camera moves, except for normal smooth perspective or occlusion changes.
I also submitted this through the Unreal Engine Bug Submission Form and am using this thread to keep a public reproduction record.
Attachment note: I attempted to attach video_comparison.mp4 here, but this forum account is currently blocked by the forum’s new-user attachment restriction. The representative video was attached to the Unreal Engine Bug Submission Form submission and can be provided again when the forum allows attachments.