Well, not sure what exactly we are talking about. The quick flickering that made it completely unplaybable is gone. I'm not sure how the shadows are supposed to look like. I tried https://cgit.freedesktop.org/~nh/llvm/log/?h=images and that's what it looks like https://www.youtube.com/watch?v=DzkV_BHXzuU (damn, gstreamer recording + vaapi encoding is stuttering a lot again)