Lumen GI and Reflections feedback thread

Hello! I’ve encountered a weird issue and I figured I’d cross-post it here since I’m fairly sure it has something to do with Lumen in conjunction with the volumetric fog.

I sometimes get small localized colored flashes at various locations in my scene. It happens while both in editor, playing, and in builds. I haven’t managed to find a way to reproduce it (tried moving the camera fast, in small increments, walking, running, etc.) Here’s an occurrence I captured:

2025-12-0110-18-12-ezgif.com-video-to-gif-converter

Here’s my original post for more info on my set-up: Small, bright, random color flashes in Volumetric Fog with Lumen 5.6.1 (If anyone as any leads, I’ll make sure to update it as well). Thanks!

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