Blue screen and green screen techniques were originally developed by the professional film industry to help separate actors shot in studio from the backgrounds that they were shot on. Later in post-processing, the blue screen or green screen background was removed digitally and replaced with a new background, shot seperatly or created in a computer. The first uses were with blue screens but blue screens had less luminosity (brightness) and exist more in subject colors (blue jeans, blue clothes in general) than green. This difference and larger lack of green in clothing makes using green screen a bit easier to ‘knock out’. Because of it’s higher luminosity, green tends to be a bit easier to light. As long as your subject isn’t wearing green clothing (or has green skin!), green screen will be the easiest to use.
The basic concept is to have an evenly lighted, easy to separate from the subject, background.
What color of green?
In general, you are looking for the purest green you can get. In other words all green, no blue or red. This is much less critical in still photography than in video. Experimenting with materials as in our tutorials section will show you which color give the best result.
The typical digital equivalents for chroma green are:
Paint or materials?
Materials range from paper, to plastic to cloth to really expensive, pro quality backdrops with stands etc….. On the tutorials page we’ll try to elaborate on different designs and techniques. Browse the pages to find the one that works for you.
do I need?
not just use a backdrop?