Hello everyone,
I was wondering if there is a solution to fix this “light circles”, they appears only when MegaLights are activated, there is 3 RectLights on the roof, right on the top of the screenshot.
And this is the same screenshot without MegaLights
Thanks a lot for help 
Interesting, I’ve never seen that artifact before. Is MegaLights using hardware ray-tracing or not?
Thank you for your answer!
Well ray tracing is activated in my project, but if there is a specific ray tracing parameter regarding MegaLigts I didn’t found it.
It will use RT automatically, I just can’t think of any reason those artifacts would be present. What does the path tracer viewmode look like?
Yes thanks for the information, I’ve indeed seen that MegaLights doesn’t work without RT.
This is the result without MegaLights, PathTracing ON:
And with MegaLights, PathTracing ON:
Btw just for your information, on the left of this two screenshots I’ve removed some blue niagara effects, because in PathTracing they was making all the scene illuminated with blue light.
Little up here
The problem still persists in 5.5.1
No idea what’s happening, but I would be curious to investigate if you can share some small repro.
Hello @Krzysztof.N thanks a lot for your answer and sry for my late response!
Amazing thank you, I’ll take some time with pleasure in order to to that, I think this week-end.
Just to be sure, if I understand well you want me to share a copy scene of the project, that’s right?
To save time:
Yes, you can describe some reproductable steps, to get the same effect, or you can share (privately with him) a ‘proof’ project. Better if you previosly clean the project as much as you can, to keep only the neccessary conflictive assets, taking part when causing the issue.
Thank you @Miguel1900 for the details
Yeah, likely I don’t need your entire scene, just some repro steps or maybe some small project with one floor mesh, a light and PPV volume. Basically some way to reproduce that issue on my end, as I haven’t encountered anything like that before.
