For green-screen work I find it's easier to be able to tune the hue of the reference color rather than mix RGB.Eric wrote:..Because the Chroma Key requires an input color... you have to do something a bit convoluted. The second input has to be a solid color which represents the color to remove, such as a Polygon with a Color module ...
I've just discovered your HueSaturation module with Lightness = 1 seems to work very well for this purpose (with no input needed). Previously I have used Resolume Avenue's AVFFGLSolidColor which again offers hue control.
BTW I seem to get slightly better keying using casty's Shadertoy "Vlahos chroma key" https://www.shadertoy.com/view/MsS3DW. This seems to totally eliminate any green fringing without impacting the brightness of the foreground object.
Regretfully I don't understand the code for either approach, but it would be awesome if you could devise a hybrid.