I wanted to experiment with UE4 Raytracing a bit. So I switched my project to DX12 (was vulkan before) and restarted it with raytracing enabled. After having tons of issues I tried a new project with the sample included that has the same issues.
Win 10 20h2, GTX 1080, newest game ready driver, more details in the dxdiag: [DxDiag.txt - Google Drive][1]
Issues: All menues are rendered as if they were editor windows (see screenshot below) making the whole editor defacto unusable.
The viewport is very stuttery, not as if I had performance, but when you move around the camera always jumps back a bit, I think you could describe the camera having Parkinson maybe. See attached video.
Often at one point the whole editor turns into a blackscreen. I could not tell what and when it happens, but it happens within a minute, sometimes if the tab out of the window, it restores the actual editor window after a while. But the black screen still returns.
But just check it out here:
[UE 4 4.26.1 DX12 Raytracing issues - YouTube][3]
I did some more testing, tried the same default scene, without raytracing in the project creation settings and it worked. Wondered why, after my other scenes wouldn’t when I disabled raytracing the the project settings, so I suspected that raytracing isn’t the issue but DX12 is.
Guess what, after setting it from Default to DX12 and restarting the project, I get all the same issues. Even with raytracing off. So DX12 is the actual culprit here…
I found a solution for my issues at least, turns out it was the nvidia driver messing everything up.
Fixed by turning off MFAA in Nvidia control panel. Not sure how it causes the issue but the editor now works perfectly fine.
You can also find it here:
turning off MFAA in Nvidia control panel doesn’t make any difference.
Every 10 minutes or so I have to restart the editor. It’s a pain.
I have installed even creator and games drivers and it’s the same
