Heres a small tutorial on how to make your very own abstract brushes. Using other peoples brushes just gets old after awhile in my opinion and limits you on what you can acheive. For those without C4D you can find random 3D renders at PlanetRenders.net . This can also apply to anything you want to make a brush from. Pictures etc etc..anything applies here.
P.S. Yes I know it should be a bit wider because some of the text cuts off a bit. Its still readable though with one damn typo at the bottom
Let me know if this helps anyone. Helping just one person will make the tutorial worth the creating time.
Enjoy
oOHereticOo