9 Photoshop brushes based on the artwork of HR Giger. His art always makes me feel slightly uneasy, and for that reason also hugely attractive .. (and, somewhere down the back of my record collection is ELP's Brain Salad Surgery ..)
you'll need to install the 'Giger Brushes.abr' into Photoshop using your own preferred method. mine is is click and drag the *.abr file into the Photoshop > Presets > Brushes folder (and it'll be listed in the brushes directory when you next open photoshop).
the preview image is a detail from the 'giger 8' brush.
and yes, it's a large file, but, in the immortal words of Julie Brown .. "i like 'em big."
the *.abr was created in CS2, on a PC. they will not work in versions of Photoshop previous to CS. they should work in Macs.