So what would be the alternative method of using a mesh to create the same sort of 3D Box that's textured independently on 5 sides?
I've used 3D Max for many years, so I'm no stranger to meshes, but your mesh program is just a distortion method really, and I can't see a way of reproducing a 3D Box with it (although I haven't looked at it in any great length).
It's a shame that you see the 3D Box as an experiment that's not going to be furthered.
In some ways, it's one of Construct's more obviously striking features, and with a few enhancements could be useful for a lot of people.
Krush.