Finally had a chance to glance at the config. I don't spend much time on this stuff any more. So I was just running through the default config, came across the system settings section and figured I'd see what would happen if I changed some values to false. Here's my view using normal settings:
(made the images clickable incase you can't see the whole image)
Then I randomly set the following to false:
StaticDecals=False
DynamicDecals=False
UnbatchedDecals=False
DynamicLights=False
DynamicShadows=False
LightEnvironmentShadows=False
DirectionalLightmaps=False
MotionBlur=False
DepthOfField=False
AmbientOcclusion=False
Bloom=False
Distortion=False
DropParticleDistortion=False
OnlyStreamInTextures=False
LensFlares=False
FogVolumes=False
FloatingPointRenderTargets=False
OneFrameThreadLag=False
UseVsync=False
UpscaleScreenPercentage=False
AllowD3D10=False
HighQualityGamma=False
PostProcessing=True
AllowRadialBlur=False
bEnableForegroundShadowsOnWorld=False
bEnableForegroundSelfShadowing=FalseSo now I get this looking out of the same window:

Some of the settings are self explanatory and others I'm not sure what they are or if they even did anything. I imagine that several people have already noticed this and a lot more. I found this in 5 minutes so think about what else is in there to manipulate. Maybe a few of you with more time/interest can run through each of those commands and explain what each does to help us better understand. I don't have the time to go through each setting one by one.
A few things need to be fixed but the game just came out so we'll give them some time. Cool game so far.