Ugh, i started making a comparison video and not I can't get it to flicker in directx mode. Sigh. I get bugs that I don't want but can't get the bugs that I do want. I didn't make the second half, as I could not get it to flicker.
I had the flickers really bad, but used -force-glcore as a launch option, and that did wonders! I looked at all of my stations and no more flickering. This forces OpenGL mode and it seems to handle the shadows much better.