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 UE 5.5 case where adding/enabling a SceneCapture2D seems to cause
visible flicker in the main viewport even though the camera and scene are
static.
Repro setup:
- UE 5.5 on Windows.
- Static test map.
- Observe the main viewport before SceneCapture2D is enabled.
- Enable SceneCapture2D and its render target.
- Compare adjacent frames in the main viewport.
Observed result:
The main view shows shading flicker after SceneCapture2D is active.
Expected result:
SceneCapture2D should not perturb the unrelated main viewport in a static
scene.
Evidence:
- Attach
evidence_sheets\06_创建SceneCapture2D导致闪烁.jpg. - Attach the minimal project showing SceneCapture2D toggled on/off.
Question:
Are there known cases where SceneCapture2D changes shared renderer state or
temporal history for the main view?
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_aligned.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.