Where your characters exist influences their appearance. I always draw inspiration from location.
Light temperature, camera position, choreography/blocking-- all these affect the makeup.
Easy on the shimmers with flash photography. They could register as plain white spots on your skin!
Light can eliminate or highlight colors. Always check the set for the type and intensity of lights used and adjust makeup accordingly.
Pack meticulously for a location shoot... then pray that you didn't forget anything important!
Make sure all the work is done before you completely thoroughly enjoy!