Hey Aumaan Anubis!
I’m using full 100% canvas space with the walls and floor materials. The trims are being designed with the same template used for the previous ones in the first two packs. It really depends on the type of mesh you’re trying to do. I have used the trim textures exclusively to texture walls and other pieces in the Interiors pack. It takes a little manipulation in your preferred modeling package, but is relatively easy. Let me know if you have any further questions! =)