Thank you Simon for your support,
I didn't see what you are talking about the Conduit FCPX/Motion 5 beta version but i will make a research after posting this answer
I don't want/need a magic solution since i know that it will never exist.
I hope to not be proud of myself saying that, but i think i know and i have at work the good setup to deal with green screen (we have just finished our shooting studio before this summer) and we haven't the money for the million bulk hardware solution when Keylight worked very very well.
Edit: i've just added to their Beta prog, tested their product for green screen and...sorry to say that, and i 'm very objective, this product give the same bad results as the others...there are only 4 parameters to control the chroma, how it is possible to work like that !!!??? unbelievable.It is exactly the same toy as the one integrated in FCPX
> 0 interest for professional production.
This is my personal feedback, don't take it for you of course