C&C

[[MPGH]Time]

I know too much greenish and the render isn't that blended , tell me how to fix or improve.

[Black Eyed Peas]

Things you need to get rid of:

-mini text
-lens flares
-borders

Applicate the created lightning source onto the render and the background.
The lightning on the render and the C4D's is opposite to the lightning you're going for.
Go to Image > Apply Image > OK > Filters > Sharpen > Auto Sharpen and put the two bars to 13 and 0.6 > OK.

[Keroaplt]

I agree with what he says additionally work with the size of the render according to the size of the canvas because in this case it doesn't use very much of the space.

[DєfKOniK]

Get rid of that border!!!!!

[[MPGH]Time]

Alright that seems pretty neat , thanks will try more new stuff.