Jim,

Quite often, on web pictures, actual pictures will be placed on a product image to enhance them a bit. I'm not sure if this is the case with Quinlow.

The only photo-resist I am aware of that works well for photographs is Photobrasive's RapidMask HD. I've seen finished products using this resist and they looked nice. They were not as sharp as what can be achieved with a laser on marble or granite.