As seen in the screenshots, the Foundry will require that UGC authors understand how to place objects in 3d space using the X, Y, and Z coordinates. So, for those of you who have never dabbled in this stuff, I created this video tutorial. I may not use the correct terminology, but I try to use common sense.

If you find this helpful, then I can make more on using X, Y, and Z scales, along with rotating the objects using X, Y, and Z.