Is it common to make gamma and matrix and pedestal and detail adjustments on a shot to shot basis according to what you're seeing on your monitor? Or do you decide what look you want before the shoot and stick to it?
Shot-to-shot as in, in the same scene? Definitely not -- pick a look and stick with it. But if it's not the same scene then you can modify the image all you want. But if you're in one scene, and you're expecting the shots to intercut with each other, you don't want to go changing those items!
