In this screenshot, the back/middle is a background PNG image with transparent sides. The sides of the alley is one image. The taxi is an image. The van is a prop but the actor is walking between the back ground and the side props. But when the van passes in between the same space, it appears in front of the actor and it shouldn't. How do I change that? Also like I tried to add a cat running in front of the taxi but the taxi appeared over it. Please help.