How do I 'stroke' a surface object?

Hi,

When I draw a surface object with surf, is there a way to 'stroke' the outline of that surface to make it better stand out from the background? It might be feasible to do the calculation by force, but I'm wondering if there's an easier way to do that. I only need the stroke effect in one viewing direction, and a solution with a surface or patch object would be best so that the line doesn't get relatively thicker or thinner when I print the graph in different resolutions.

Thanks a lot!

Niko

[Walter Roberson]

Stroke? Do you possibly mean something like a shadow or lighting effect?