Object with faces that intersect adjacent faces The following file
https://www.dropbox.com/s/dpwqgv2brfgzstg/PathPrefab5.blend is part of a project I'm working on.
I tried to make a curved mesh by extracting faces from a cylinder, and extruding the extracted faces, constraining the z axis, to give the mesh depth. But the cubes resulting from the extrusion collide with each other. How can I create this without the meshes colliding?
For that particular example, you could merge near vertices:


Select all (A)
Remove doubles (W> Remove doubles)
Increase merge distance (F6> Merge distance) until the adjacent vertices are all merged.


Once you do that, you will still have internal faces. To get rid of them:


Press Interior faces in 3D view > Header > Select to select internal faces.
Delete them (Delete> Faces)