Steps to reproduce:

1. Open Unity;
2. Open attached project;
3. Close Unity;
4. Repeat step 1;
5. Open attached project;
6. Open scene "Occlusion_plane";
7. Switch to "Occlusion" tab;
8. Press "Bake" button;
9. Observe the Scene view.

Actual result:
Plane becomes half black after baking Occlusion Culling (see attached actual.png screenshot). Seems to be related with either Scene view window size (when resizing the issue disappears) and with Camera's Clipping planes (near 7 and far 12 values as well as values nearby will give a repro).

Expected result:
Plane should be always be white after baking Occlusion Culling.

Regression from Unity 4.6.

Reproduced in: 5.4.0a2, 5.3.0f1, 5.2.0f1.

Notes:
- The bug reproduces only on Windows (8.1 and 10 checked);
- The bug reproduces only with certain Camera clipping planes value (7 and 10 would give a repro).
- Regression since 4.6