Here 9 hi-res (1000 up to 2500px) PhotoShop brushes created from 1 layer quality UltraFractal renders. Called them so as they are suitable for creating quickly fantasy backgrounds and textures like rocks, cave and catacomb walls, alien metals etc. The left part of the preview image is a small crop of a much bigger - 4000X3000px image made only with these brushes in some 10 min.
You can also opt out for 2 sets of 3 original hi-res 4000X3000px textures for 100 points only each set. Had to split the file as it was too big so check out also Volume 2 - [link]