I don't mind if the different "patterns" use different subfiles.
And it is possible to have the front different from back. The "edge" between the subfiles doesn't need to be perpendicular.
Since there are both solid/solid and solid/trans combinations you need to place the "inside" surface in a separate subfile.
And it is possible to have the front different from back. The "edge" between the subfiles doesn't need to be perpendicular.
Since there are both solid/solid and solid/trans combinations you need to place the "inside" surface in a separate subfile.