I think this issue is related to the "timelapse", the movement of the sun. Since they are dynamic shadows they will update every few seconds according to the daytime. i dunno if there is a workaround, but probably in the future something will be out. Yeah, that's exactly what I thought. The shadows appear to 'dance' around somebody's face as the sun is constantly moving, shifting the light source and therefore the shadows. I guess longer days/nights would help this issue, reducing the frequency that they update/move It doesn't look great though