Not with Motion alone. Zaxwerks has a plugin that works with Motion.
Stackwerks. Looks like it might produce the results you're looking for.
says:
"...Choose from a wide range of primitives and apply textures to different parts of each object. Textures may be images, movies, text, or any Motion layer, so Stackwerks integrates well with Motion...."
Maybe you can download and try it first. I don't use the Zax plugs in Motion, only AE. But in After Effects, if the Zax stuff isn't 'licensed', it will work - but render a watermark onto final movies. If it behaves this way in Motion you might be able to see if it's going to even work - before spending the loot.
Good luck.