Yes...I have.
I've attached a sample of one of DogWaffle's brushes. The faster you drag the brush, the larger the leaves.
In this sample I chose one basic color for each line. DogWaffle incorporated the other colors. It appears to me that the brush is in .OPT format - evidently obsolete.
IF I could, in Paint.NET, create similar .PNGs I would be willing to help her do that. However, the multi-color part has me stumped. I use Paint.NET almost exclusively for "flat" simple graphics so if there are more exotic tools available I'm not familiar with them.
Thanks for the answer, Rick, I really appreciate it.
RP