any ideas why the edges which should be hidden behind the mesh (w/ solid material, standard lambert) are showing at least partly? When I zoom in they shrink, zooming out they get bigger and at certain angles the faces even start flickering with black bits.
I was playing around with a lattice, nothing special. The geometry was extruded, but there are no double faces.
![user added image](https://s29.postimg.org/sdjss8e8z/strangeedges.jpg)
![user added image](https://s29.postimg.org/jh4fajy8z/strangeedges2.jpg)