I have made a stationary loop of a figure walking up stairs in After effects. I made the rotoscoped video move diagonally in the direction of the stairs so it would stay in the same position. But when i render it it has these blobs coming off the back of it which you cannot see in the workspace? is this something to do with the roto brush?? This is rendered , its just int he workspace here.
Any help is much appreciated! Final project hand in looms!