Not sure if I got everything you wrote. But the Grasshopper will be your best friend in drawing complex 3D models for your project.
For Viz purpose check this “Shut liming” in Rhino:
I don’t like it that much, since it is very slow, but it could serve.
Proper UV mapping could be pretty tough in this case, I am afraid that you have to unwrap it.
Best,
D.