Attached Link: http://www.renderosity.com/viewed.ez?galleryid=662006&Start=1&Artist=Tyger%5Fpurr&ByArtist=Yes

It is actually not that unusual to cut your scenes into sections or layers.

You just need to be aware of where the shadows are and cut it up accordingly.

I did this image
http://www.renderosity.com/viewed.ez?galleryid=679353&Start=1&Artist=Tyger%5Fpurr&ByArtist=Yes

in multiple runs. I even changed the lighting to allow me to cut it up easier.

There are different methods for different needs.
You can cut them side to side and post work them together.
You can layer them back to front and post work them together.
You could even layer them from back to front and use the back image as a background image for the next closer layer. This is how i did the image linked above.

This image

http://www.renderosity.com/viewed.ez?galleryid=662006&Start=1&Artist=Tyger%5Fpurr&ByArtist=Yes

is the first one i layered and i explain where the layers are and how i put it together.

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