Bend rectangle along its long axis I am trying to create a 3D model of a Penrose triangle



different angle of a 3D Penrose triangle


I am currently following the obvious path which is 3 rectangles with lowered edges at the ends to make them fit with the rest. But as you can see in the second image, the rectangles are rotated/bent on their long axis. How can that be achieved on Blender?
The key point to an optical illusion is that it is an "optical illusion" and you usually can't model them accurately. You should create a model that looks right from the camera, but may not look right as you rotate around the model.

For the triangle you are doing look at this

A tip that can help is to use the Blender Internal for rendering. Under the Options panel of the material there is an Invert Z Depth setting. I haven't tried doing the same in cycles.

This scene -



renders as this -



I believe this was created by Ton back in blender 1.70, you get a copy of the file here