Spiderman

Ooh this looks pretty good :D
The render could be blended in a bit more, just erasing with a low opacity soft brush and/or smuding on low strength around the render's edges would help.
A low strength blur on his hand behind him and on the web could add a little to your depth.
I feel like it's missing something though...maybe more effects in front of him...like a thin sort of fog or something might look neat?

Lighting and flow look pretty good, keep it up :D