IMO the best rendering software for Amiga is Cinema 4D version 4. You'll be able to set up your first animation-not just scene but animation-complete with lights, textures, motion paths in half an hour. It lacks some high end features like collision detection, but its key frame animation system lets you animate any object property you like eg size, speed, texture, texture, transparancy very very easily. Stuff that takes weeks to learn in Imagine you can learn in a few days with Cinema 4D.