Hello everyone. I came across this. In a specific place in the scene there are distortions in the form of squares. Changing the settings known to me did not lead to anything. I excluded objects and light sources from the rendering and the squares disappeared. But these objects must be in the scene.
a screenshot would help. we supposed to guess what it looks like?
Sorry for that. But I solved the problem. UE does not like many sources of light close to each other. I used Alt+7 to check intercections ot lights. And all my scene was grey. I`d made some changes and artifacts disappeder.