Lumen reflections rendering latency / refresh rate in real time ??

Development Rendering
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1

Hello,
Here’s my problem. I have integrated a led screen on my stage, but I have a rendering problem with lumen, the reflections don’t load quickly enough and when there are strobes or fast videos the reflections are super slow (video attached). In scalability i set Shadows, GI & Reflection to “High”.
The video signal comes from a Blackmagic capture card, I have the same problem with NDI…

Maybe Lumen isn’t made for this idk ? I’m still new to unreal

Do you have any ideas?

Video : Lumen reflections problem - YouTube

PC Config :
I9 10900X
RTX 4070
32GB RAM

Many thanks

2

It’s not. I’d go as far as to say it is fundamentally incompatible with this type of use case.

You can try increasing the Lumen update speed in the post process volume… but honestly… I highly doubt it’s possible to make it update fast enough to accommodate a strobe light.