CnC:
I don't usually do this because I barely do GFX myself. I'll look at this at a different point of view. :p
You must login or register to view this content.
The render you used doesn't fit the background, but the colors mix in very well. Work on editing the actual render and making it fit with the background.
You must login or register to view this content.
This one looks perfect. The render is great with the background. But maybe just few more things one it so the render doesn't pop out
too much. Didn't really need too much work on the render.
You must login or register to view this content.
Pretty much the same as before, add a bit of blur or something to the render so it doesn't pop out way too much. The background looks sexy
You must login or register to view this content.
All I can say is that the color didn't mix well with the render, maybe a bit darker of a shade.
You must login or register to view this content.
idk what to say about it
You must login or register to view this content.
Same thing as the first few, the render :p You left a few pieces on the front tire. I see what you're trying to accomplish with the flame like background. :p
Final notes:
They look really awesome, just a few minor details here and there will do a big difference. Its not always about the backgrounds, it seems like you take more effort onto that and less onto the big picture.