Translations:Kdenlive/Manual/Effects/Alpha manipulation/Blue Screen/35/en

See also Key Spill Mop Up effect in the Misc group. The Key Spill Mop Up effect can be used to improve the edges of the blue screen effect - when edge problems are caused by "keyspill". Keyspill is when the color of the screen used for colorkeying spills onto the subject due to light reflection.