this is something you ask BEFORE the shoot. like much much before. it should be in the contract.
some photographers have a specific style that clients are hiring them for but that should be put in writing. some clients just think your stuff looks cool BUT want it a different way like cooler or warmer or grainy etc almost like your a graphic designer almost but its baked into the photo edit and i'm happy to oblige to that for my day rate , edit fees and usage fees. :)