Flickering in a mirror UE 5.5

Development Rendering
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13

Hi everyone and thank you very much for your advice.

I have done several tests in this time and finally got better results with this configuration:

  • Machine: i5-12400F, RTX 4060, 16 GB

  • The console variables in the export settings:
    r.LumenScene.Radiosity.Temporal.MaxFramesAccumulated 32
    r.LumenScene.Radiosity.HemisphereProbeResolution 4

  • Post processing box settings:
    Lumen Scene Lighting Quality 8
    Lumen Scene Detail 4
    Final Gather Quality 2
    Quality (Lumen Reflection) 2
    High Quality Translucency Reflections Yes
    Max Reflection Bounces 4
    Max Refraction Bounces 4

  • Mirror material:
    Color Base B8D9D9FF (slightly blue/green, I think it adds some realism)
    Metallic 1
    Roughness 0.04 (a little bit of roughness helps with distant details that don’t reflect perfectly)

Surely I could optimize the parameters even more but it looks good to me compared to the beginning. This is the result:

I will also keep the trick to duplicate the whole room and apply a transparent material in the mirror, in case I want to render the scene even more accurately.

I will continue to do more testing and keep you updated!

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