Your first pass should be a color pass only, though there is shadow on it. If you blend the shadow pass with this one you will have double shadow :)

Seriously, interesting results. I like to work with passes myself, it gives you more control as you can increase or decrease an effect, play with some masks etc...

Now what about that green bg you have in your composit, it reminds me those green bg used in movies to blend cg with live shots. Is it for something like that?

And what is that figure?

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