Depth of Field?

[Renegade_]

Actually no. This has nothing to do with flat or actual 3D depth; DoF deals entirely with the blurring of out-of-focus objects. Read this text, notice how the rest of the text around is not as clear this word you are reading right now? That's DoF, again it has nothing to do with 2D or 3D, again depth != DoF. Unless you are forcing the player to look somewhere (bad) and/or artistic merit (pfft), there's no need to emulate DoF, your eyes already do a much better job.