Need Blue Screen help!
Posted 24 September 2006 - 01:13 AM
Posted 25 September 2006 - 02:42 PM
As for how to light the subject, I usually look at the plate, or if the plate isn't shot yet, I go to where it will be shot and come up with a plan to light them so it will look real when it is added to the plate. I usually make sure the subject is at least a little brighter than the greenscreen, but also lit with light that will match the plate. ( It might mean making one side brighter than the other side, or having them fall through pools of light as you suggested.)
If I ever have questions about what will make it easy or hard to pull the mat, I call the person who will be pulling the mat and ask how I can make it easier for them. I have found that I get different answers depending on the person and the tools they have available to them. It varies from having the screen at exposure, to having the screen 1 stop below exposure, to having the screen 20% below exposure. Some will tell you a little green spill on shiny shoes is ok, some will say no way. It will give you an idea of how much to sweat on set if time is becoming a problem. ( I always try to make it perfect, but when time becomes a problem it's nice to know what you can get away with).
I am currently in preproduction for a short 16mm film. We are looking at doing several scenes with the aid of blue screen. I am looking for advice on two particular things. First, when using blue screen outside, what is the best way to light the screen? Should we use diffused (artificial) light , or just use let the sun do all of the work? We also have a scene where we will be suspending someone from a harness (for a falling sequence.) The blue screen will be hung above the suspension riging. This image will be added to a night exterior scene, where a person has fallen out of an apartement complex window. My concern is lighting the person so it looks realistic as they fall . Should I have them fall through a pool of light (resembling the ambient light from street light,) while having the rest of the vertical fall darker? Or should I have them lit evenly the entire way? How bright should we light the blue screen for that shot? Any help would be greatly appreciated! Thanks. -Andy