Ray Tracing Overview - Unreal Engine 4.22 Preview

[Dimax3dd]

@SonKim

Are you lighting your scene with a HDRI or skylight? Are you using RTGI? I had similar issue with skylight + RTGI, you’ll get halos and other artifacts…so I disable skylight.

Try isolating the rendering features and light to see what is causing the problem. Try lighting with lights, turn off everything else(RTGI,reflection,AO,post process).

edit: I think it’s related to the RTGI(it’s really experimental feature). See my attached pics. The one with the black arrow is RTGI = ON, the other one is RTGI = OFF.

Thanks for your answer, I tested all the functions, the loop disappears when the GI turns off and when I turn off the shadows. I attached a video for understanding. I do not use HDRI in my stage and there is no glass, quality changes do not affect this loop. You have visible artifacts on your image, they are visible when I move the camera
https://youtu.be/MnoXrQ2U2Uk