The best ways to control contrast and/or saturation is either in post processing or better still with the quality of the light when taking the picture. (ie: Full summer sun/ single direct flash, for high contrast/ high saturation subjects.Overcast sky/ diffused flash for low contrast/ muted colour subjects.he best ways to control contrast and/or saturation is either in post processing or better still with the quality of the light when taking the picture. (ie: Full summer sun/ single direct flash, for high contrast/ high saturation subjects.