What's the quality that gives some lenses (like Minolta G) a "3D" look?

arie wrote:

There have been a lot of people who comment that some lenses produce images that have a 3 dimensional look, or at least no "flat" looking. Most notable are the older Minolta G lenses, an the CZ lenses.

Does this have to do more with the coatings on the lens or something else?

Use of short DOF also produces a more dynamic image, but there seems to be something more to it.