Recently, I posted about achieving dramatic lighting and some problems I was running into. I have been watching many videos with dramatic lighting (part of the face lit up, and the other part in shadow) What I have noticed is that in these videos. The shadow part is BLACK, very smooth and crisp. When I take video, the lit up part of my subjects face is good, but the dark side, is very grainy. How do I achieve this "crisp" distinction between light and dark, this absolute contrast? Do I do it in post, and if so how do I do it?

