This is one of the tricks that comes in handy, whenever you have to deal with an unevenly lit green- or bluescreens, but it has to be said, that this is not a one click solution …it will just bring you closer to the desired result.
First of all check out your material for the uneven area and make sure to not lose any detail around the object you want to keep. In our case the uneven region is in the lower right corner, which can easily matted, but imagine the character will move in front of it, then there would be no other way than doing some nice roto or use this trick.
So now let’s check out how it’s done
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