Acme Bricks Masonry Designer
http://www.accurateimage.com/acme/help/index.htm
Acme Bricks' Masonry Designer builds visualizations of walls, freely mixing hundreds of materials and dozens of mortar colors.
Outputting to an image file or to a printer, these visualizations can be put to immediate use by both designers and decision-makers.
That looks like a cool program. Have you used it with KeyShot?
Yes, and I think the output quality is is good:
My example: Red Colorado texture
2736 x 1428 / 150 ppi / 24 bit / 3,31MB
Here is a q & d Snapshot. :)