What other methods can be used for achiving depth from a 2d image.
i know its a bit of a general question.
I am thinking of the direction of vanishing point in Photoshop to AE and\or Parallax bg and fg...
Any thought is appreciated
A manually created z-depth channel can be pretty useful. It looks better if used with a plugin that can create a 3D object out of the map (Freeform Pro or Mir, for instance), but can also be used, to a limited degree, with the displace effect. A combination of a manually created depth channel with a grayscale version of the original image itself overlaid onto it at low opacity (a sort of a bump map) gives much more detail into the depth map.