They are quite simple; you can get different nuances by fiddling with the settings. Like opacity, etc.
(The picture below is pretty big)
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Edit: I can't seem to upload the .tvpx file to the forum so here's a link.
Edit2: Herve Fixed it. (below)
Thank you MikeSewie wrote: Edit: I can't seem to upload the .tvpx file to the forum
I've tried to optimize the brushes as much as I could, so I believe they should do well on normal or medium-fast processors as well....on a fast computer, these really shine.