Yep, I know, hehe ! @ bikermouse: That's negative, sir, my sun and sky/clouds did not move ( cloud parameters were on 0, turbulance and speed) and sun was linked to the view ! :) I just tried simple multiple render (not animation) and rendered 10 single tiff images with different refraction and animated those myself in AnimationShop, and still I can see a change !!! :) Dunno, maybe I'm just sleepy, lol, it's 5:30 AM here !!! :)