Lighting renders based on pilots head, not light source

[Highwayman-Ed]

Found some odd behavior this morning on the way back from Mission 2 in the Huey UN Campaign (by the way, this is amazing since 2.5 was released!)

 

With the sun low in the morning sky and my back around to it as I flew to the West, the light from the sun varied on the terrain as I rotated my head. See the two screenshots below for a clearer explanation.

 

In this image the highlighted area is a lot darker, when the sun was DIRECTLY behind my viewing angle. Notice however that it's not just the trees which stand out, which is what I originally noticed, but the whole scene

 

In this second image, you can see that EVERYTHING is lighter.

 

With the sunlight behind me, everything was darker, as I rotated my head (left or right) toward the sun light everything became brighter!

 

Textures set to Medium

Terrain Textures set to High

Deferred Lighting is On

Lens Effects set to Flare

Shadows are set to Medium

Terrain Shadows are set to Default