The indents (where the fabric stretches over the frame) is actually 2D for 3D- I did it with the texture. I plan to eventually put it in a Fight Sim (Targetware) so I need to keep polys to a reasonable level. This one is about 3,400. Here is the plane without the texture:
http://mysite.verizon.net/vze4rj8j/no_texture.jpg
Oh, here's a shot of the actual plane:
http://samoloty.webd.pl/holenderskie/dxxi1.jpg
I'm working on the cockpit now.