In Vfx there are: LumaKey:Grey, LumaKey:White and LumaKey:Black, I'm searching for something like that but with chromatic/color use, e.g. ChromaKey:Green
thanks! it worked for video file. but how to apply this for camera source? in Vfx in file explorer is a folder with all video sources, but I dont see this in Cross. I can turn on camera as video source for deck but is not avilable in track rack.