The two images attached show a grey background with a cyan circle and a black circle. There is a green rectangle behind, so green means transparent.
I want to make the black part transparent with the following filter:
object.fill.effect = “filter.chromaKey”
object.fill.effect.color={0.0,0,0,1}
object.fill.effect.smoothing=0.001
object.fill.effect.sensitivity=0.001
I test with two grey backgrounds: one has rgb(100,100,100) and the other had rgb(100,101,100). The rgb(100,100,100) grey turns green – it gets chromakeyed along with black, which is unexpected. When I tweak the color a tiny bit (rgb(100,101,100) then it works!
https://www.dropbox.com/s/todlm92r2hbl70x/Screenshot%202014-04-20%2017.24.12.png
https://www.dropbox.com/s/wwv1lo2a6l96o58/Screenshot%202014-04-20%2017.25.05.png
