Don't know if it's relevant but I tried an experiment with Ink9000 a little utility for doing line/toon renders of .obj files. It let's you export as Illustrator .ai, as well as .tga bitmap files. I loaded the .tga in my editor, PhotoPaint, and then imported the .ai file. By default, the .ai was 1 pixel different from the .tga (883x660 vs 883x661). Whether I used the default or resized to match, pasting one over the other, they do not match up exactly--almost but not quite.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken