i think your mixing media , and its not working to well for you , the 3d in the background is all look at me im 3d and your stock is a 2d inked cartoon , try using differnt effects for the backround instead and your light seams to be everyware but were you want to be , on the stock , maybe use some displacment effect and smudging to blend the background and help it lose its pop without taking away its depth, also id say sugest adding some low level gradient maps , colour ballance and curves layers to blend the colours together better , but its a good start. hope i helped 6/10