Neekow

hi everyone, i've a little problem. I did 2 models with Mineimator that i move/rotate/etc ... but sometimes i've black points and lines. Any idea on how can i fix that? They appears when its moving. Some infos: - Everything is done block per block, already tried to upscale everything (as it seems to be a border of blocks), changes nothing - GPU => R9 380 (as it's often asked). Drivers up to date.