>>299455875
>Unity automagically calcs that for me?
Occlussion auto calcs yes as long as you click the button for baking occlussion
To be more specific in checks for objects that are flagged "Static Occludee" and "Static Occluder"

>>299455875
>drapes in a couple rooms I have so far which I subdiv'd and cloth physics'd into place to get some nice curves/wrinkles.
If your cloth has more than 500 vertices use dynamic bones instead of cloth physics.