Transparent mesh in Edit mode I am working on large project (256x256 meters) and I use metric scale.
Suddently, in Edit mode ( either in Solid or textured)  all my mesh are transparent . By running a search about the issue I found it can be related at this one

1: Shadows along edges of mesh in 3D View and this one

I tried to change the clip Start at 1mm End at 10M but nothing changes. I tried to change these values in many ways but nothing change.

I am sorry to post it as a new question , but my "reputation" does not allows me to post comments.

TYVM in advance

Note : It is NOT the "Limit selection to visible" button ;-)
Disable Hidden Wires

You may accidentally enabled the Hidden Wires Option in the Shading section of the the Property bar.



Because the mesh is composed by a single N-gon, there are no other wires to display than the boundary edges.

The option is available since 2.69 version and is usually helpful while retopologizing. You can find more info in the release notes.