What will fix this

[cppcooper]

So I have a problem in game, I have textures and or shadows causing this to happen. I would like some help in figure out what setting I could increase to remove the unwanted effect.

 

Note above the middle of the screen, on the ground to the sides, there is some sort of darkening of the textures. It sort of looks like an anti-aliasing issue, but I've already tried about 4 different settings.

http://s8.postimage.org/mt5cd9khx/Screen_Shot5.png

 

If these settings help any:

[General]

fBrightLightColorB=1.0000

fBrightLightColorG=1.0000

fBrightLightColorR=1.0000

iStoryManagerLoggingEvent=-1

bEnableStoryManagerLogging=0

fDefaultFOV=80

 

[imagespace]

bDoDepthOfField=1

iRadialBlurLevel=2

[Display]

iBlurDeferredShadowMask=4

fInteriorShadowDistance=2000.0000

fShadowDistance=2000.0000

iShadowMapResolutionSecondary=2048

iShadowMapResolutionPrimary=2048

iShadowSplitCount=4

iMaxAnisotropy=12

fLeafAnimDampenDistEnd=4600.0000

fLeafAnimDampenDistStart=3600.0000

fTreesMidLODSwitchDist=5000.0000

fGamma=1.4000

fDecalLOD2=1500.0000

fDecalLOD1=1000.0000

fSpecularLODStartFade=4000.0000

fShadowLODStartFade=400.0000

fShadowLODMaxStartFade=8000

fLightLODStartFade=4500.0000

iTexMipMapMinimum=0

iTexMipMapSkip=0

iWaterMultiSamples=0

iMultiSample=2

iShadowMode=3

bTreesReceiveShadows=1

bDrawLandShadows=1

bFull Screen=1

iSize H=1080

iSize W=1920

fMeshLODFadePercentDefault=1.2000

fMeshLODFadeBoundDefault=256.0000

fMeshLODLevel2FadeTreeDistance=2048.0000

fMeshLODLevel1FadeTreeDistance=2844.0000

fMeshLODLevel2FadeDist=10000000.0000

fMeshLODLevel1FadeDist=10000000.0000

iScreenShotIndex=4

bShadowMaskZPrepass=0

bMainZPrepass=0

iMaxSkinDecalsPerFrame=25

iMaxDecalsPerFrame=100

bFloatPointRenderTarget=0

sD3DDevice="NVIDIA GeForce GTX 580"

bFXAAEnabled=1

iShadowMapResolution=4096

fShadowBiasScale=0.1500

iShadowMaskQuarter=4

iAdapter=0

iPresentInterval=1

iShadowFilter=8

bShadowsOnGrass=1

bTransparencyMultisampling=1

bDeferredShadows=1

bDrawShadows=1