Blender 2.79 Camera ortho doesn't show some roofs. But top ortho view does Camera ortho doesn't show some roofs, although each building has a roof.
Tried to flip normals, doesn't work.
All the roofs are displayed in top ortho perspective
Tried Clipping, doesn't work
The problem is mainly due to the camera Z position which is below top roofs (and so due to some limitation can't see them).



Move your camera up.

And adjust the following values: