OK but what I mean is, should I lay out all the UVs for everything (the shingles, fireplace, siding, PLUS all the assets inside like the faucets, fridge, washer/dryer, etc...) on one UV snapshot or is it common to have a bunch of separate ones.Having a UV tile for an entire object is pretty standard. Having a material for that object, or even multiple materials, is also very common. So yes, you will have a lot of materials if you have a lot of objects