PBR Standard Shader not Working Project Wide in Unity 5.3

My intuition is telling me I am probably missing something incredibly obvious here, but I'm new enough to Unity that I might not know the obvious thing needed to reach a solution.

I was playing around with adding VR to a project of mine, but after some experiments I decided not to implement VR. When somewhere along the way to enabling Unity in VR mode I believe the standard shader for PBR completely stopped working. All reflection disappeared in every scene, basically killing the game's visuals. Is this some configuration issue? I should note that this project was started fresh in Unity 5.3; nothing is transferred over from old Unity without PBR.

Worst case I might just have to start a new project and transfer the assets, but it would be nice if I didn't have to do that.

Example from Scene Window: http://imgur.com/ktdyUfg

It even affects the material preview renders: http://imgur.com/apsvpw6