I am (still) trying to convert a built-in render pipeline to HDRP with ray tracing. With ray tracing enabled, I get a lot of screen flicker. Here is a first screenshot.
A second shot (I made no changes in Unity). See the side of the deskon the left? The vertical panel is now dark. This sort of flickering is going on all the time.
Thanks. I have TAA on and always update. I am doing it in editor mode as I am trying to create animated videos (not a game). I am using the Unity Sequences package. “Play” mode is basically “render it”. So I need to get all the exposure correct per camera shot, Its only designed for Editor mode basically. (Oh, and when I did try it, it did not resolve the problem).
Experimenting a bit more, this was inside the building. Outside seemed fine (away from the building). So I thought perhaps it was all the individual lights inside it could not keep up with. So I turned off all the lights except for the “sun” directional light and one light near the character. Better, but still not great. I also turned off volumetric cloud shadows. Seemed to help a little. Basically, as you say, it seems like “it is not keeping up”.
Still trying, but turning off “Screen Space Ambient Occlusion” seems to be having the biggest impact. Turning it off helps a lot.
The other problem though might be to do with area lights - they flicker on and off when I have a few of them. Changing to point lights solves the flicker. I was using area lights for rectangular lighting panels on the wall, but looks like I need to ditch them for reliability.
