Originally posted by Imageman Making a change in camera is just plain wrong, Its in Post Processing where you need to work, so much more flexibility.
If the camera is shooting RAW+JPEG, changing camera settings will change the image on the rear LCD, so you can see if you're getting a decent shot to work on later. The RAW data is still there for processing. That can be important because the camera's meter isn't color-specific, so checking the RGB histogram in the field will show if one color is overexposed.
I do something similar when I shoot with an infrared filter.