Anyways, I have used the excellent tutorial at https://www.fenriz.org/projects/maya/..._shading_i.php to get cell shading from Mental Ray shaders and have succeeded in getting the cell shading effect very well. This image is just for example purposes:

My question is how would I go about getting outlines around the whole outside of a group of objects, or combined objects, like, for example, in a cell shaded game where characters are outlined from the background, but not necessarily all the sections that make up the character. Something like the following (photoshopped):

With or without the lines separating each part, I'd like to know both.
Anyone who knoes how to do this, I'd really appreciate the help! Thanks!
- Jesse