Mobius strip building with regulated height and smooth facade

Hello, I can’t set 3 ceilings with 3 m space above it in Grashopper. I used to design it manually in Rhino, and manually deform it in Archicad (results for visualisations are average). I also have problem with elevaion consisting many triangles. :


And front view

I can’t set rules for clear Mobius shape (twisted 180*) and regulated height above ceilings.
Please help me out.

Here are parametric files:
PARAMETRYCZNA WSTEGA MOBIUSA.3dm (69.1 KB)
PARAMETRYCZNA WSTEGA MOBIUSA.gh (18.5 KB)

and done manually in Rhino:
mobius strip.3dm (854.8 KB)

and in Archicad:
wstega Mobiusa z Archicad25.3dm (167.9 KB)