Best way to represent alternative interior designs

[Charlie_v]

Possibly a solution in this other thread?

Color by Layer, but only *certain* layers?

Thanks for all the suggestions. For clarification on my specific problem, I uploaded an example image of what the colorized buildings look like. The ground floor might have a different use than the top floors (i.e. apartments on top of a store), and thus one building could have multiple colors.Each building is a group of floors, each floor is a group. Color is applied on the floor group, not inside it directly on the faces. Now imagine that same exact image except all floors in each building are…