stbenge wrote:
> Basically a proximity pattern is like a gradient indicating the distance 
> from a surface in 3D space. Imagine making an object pattern from some 
> object and applying a 3D blur to it. What you get is a fuzzy 
> representation of your object, but in pattern form. As a special bonus, 
> the inside edges and vacations end up black, the outside edges and 
> protrusions end up white, and all the flat parts in between end up a 
> gray color.

Sounds like AO.  The occlusion effect is likewise achieved by taking 
into account surrounding geometry, not angle of incidence or position of 
light sources.  Your image looks very AO like.

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