This image extraction was done from a cyan colored background. Easy Green Screen 3.5 will auto detect different shades of blue. When the the hue becomes closer to cyan then EGS will automaticall switch to cyan extraction mode. This is done without user intervention needed.
To extract a cyan background, choose Blue for the extraction method. EGS will decide which extraction method works best, blue or cyan.
The background is a 3D render. Using 3D render for backdrops gives a photography studio or graphics designer more possibilities than ever before. Software has come a long way in being able to produce photo realistic images.