I found an image by Jenny Goodall, a UK photographer, and then painted over it onto a new layer. The Mixer Brushes let you sample not just color, but an image area for use in your painting. They work by picking up a region of an image, and loading that image into the paint ‘bucket’ like you would on a mixing palette. The result is then painted directly as the usual paint would be, or can be mixed with whatever is underneath. You can also control how ‘wet’ the brush is, and whether it gets cleaned after every mark or stroke.
I’m really looking forward to incorporating this new feature set into my work! Questions or comments?