Maya-to-Unity3D: backfaces are not drawn in unity

I’ve made a simple double sided mesh in Maya (an open Cylinder).
Deleted all “History” & “Non-Deformer History” via Edit->Delete All by Type
saved it as .mb and imported it into Unity by dragging the file into the Assets folder.
Unfortunately, the backfaces kinda got lost during the Import…

I don’t know what I’m missing here…

Do you mean double-sided as material property (this is totally Maya-specific) or a real shelled object (has polys in- and outside, has a wall thickness)? Former won’t work, latter will.

Maya solution: apply a shell modifier or something like that (don’t know the exact way in Maya), or duplicate your cylinder, invert the normals of the second one, and merge them together.

Unity solution: You could write a custom shader/change an existing one to display backfaces. All the built-in ones cull them away for performance reasons.