Compositing fog elements seems like a pretty straightforward thing to do in After Effects. Shoot or render your fog element against black, and then Add or Screen it on top of your footage, right? Wrong. This method is incorrect. Daniel Broadway goes over why.
Daniel Broadway is a professional graphic designer working at an NBC affiliate as Graphics Director. He is also a freelance visual effects artist and compositor, having worked as visual effects supervisor on two independent feature films "20 Years After.", and most recently "A Lonely Place for Dying."