Hi, presto423,
Thank you for your suggestion, I tried a lot of things: change EV to the extreme, lock EV, increase brutal force bounces, change materials. I clearly don’t understand how Raytracing in UE4 works, because the latest UE archviz demo scene works in my pc like it should, I tried to find solutinion by reading tutorials, watch youtube for a few days and still don’t understand what I’m doing wrong.
I tried to monkey up with a lot of setting but for this example I just used empty architecture template with raytracing enabled. Didn’t touched anything except I deleted SunSky and put HDRIBackdrop and RectLight instead. Disabled Lightmap by word_settings>lightmaps>force no precomputed. Enabled raytracing brute force mode with 1 bounce and 16 samples. Created simple gray material. And this is what I got.
https://wetransfer.com/downloads/537…2225952/f7e24c