Decals!
blog.wolfire.com/2009/06/decals- … ion-video/
prequel:
blog.wolfire.com/2009/05/decals-editor-part-one/
blog.wolfire.com/2009/05/decals-editor-part-two/
blog.wolfire.com/2009/06/decals- … art-three/
actually it has some amazing stuff:
blog.wolfire.com/