Parametric Transparency Map?

Is this currently possible? 

It would be great if grasshopper could generate bitmaps or other images which could be linked to transparency maps. I'm not sure how this would work - maybe exporting screenshots of a top view looking down on a GH generated 2d pattern (black figure on white background for example) and then overwriting each screenshot so the name and location stays the same?

Would be so much nicer for situations where you are splitting a surface with hundreds of objects to get some sort of screen like material.

What do you think?

-Brian