How would I use these "Par 1, 2, 3"? I can't find any articles over it. 

We have a custom made library and I notice the foundation library uses these functions for like grain direction blocks, drawers, etc. I just can't get it to pull in our own blocks and use them in the 3D. Just would be cool to add it to our own products. 

Looks like it's just a file path and a block name, just can't get it to pull in.