I adjusted the Light Source and now half of my textures seem to have degraded in quality

So I am finishing up a school project and I had just finished my lighting, I messed around with the lightsource (still the default one) and it caused alot of my textures or objects to severly drop in quality. I am not exactly sure what happened, but this has really screwed me over since tomorrow is the deadline and my backups are un-usable at this point.

The center rock is the quality of how everything used to look, but now it all looks the the objects around it. Is there anyway to fix this?

This is another example, the object looks normal in the mesh editor, but looks gray and bland in engine

put a lightmass importance volume around your scene.
What kind of lights are you using? (static, dynamic, etc)
did you rebuild lighting?