how can i resolve this?

hi all !!

i’m not speak a lot of english but i try it !!

im rendering a scene and i’m being some problems. one wall of house are very saturated, i think that is for the tree. how can i reduce this green saturation ?

and other question is how can i make more darker the corners between walls and ground?

thanks a lot and sorry for my english.

spline

As I see You R probably USING LINIER Type on the ColorMap Section -
SWITCH TO : Expo