It’s nice to use Blender but the flickering shadow is not. I Bing-searched and the same problem I have. Anyway, back to Maya. A scale test for the model of Imperial Star Destroyer and Millennium Falcon.
Sample renders from my animation. Tried 750 frames for HD 720 (1280x720pixels), but it rendered 8-12min./frame on my computer…yikes!
Anyway, back to my previous size…HD 540