JoshQ

Above the red line: a simple uv map where exterior and interior faces share the same space, easy to make and it works with CAS patterns but isn’t suitable for baking in Blender. 

Below: a more detailed map where every face is represented and, as you can see, takes a lot more space (and time to make). Both are from the same mesh and the latter is how I’m going to unwrap my UVs from now in the pursue of better textures.

Another type of CC that benefits from this approach are 3D accessories (necklaces, belts, nails, etc). Now, this is “tricky” because as you might know the game’s engine reduces the texture quality the more accessories  you put on your sim, but unlike shoes I can use the whole 1024x1024 area to counter it (more or less).

tl;dr: at the very least shoes and accessories are going to get a bump in detail from its textures, and because it takes more than double the time to make I’m back to 1-2 releases per month.