You may have already found a couple new additions to GMIC's Artistic menu. "Rodilius"
One is under Sequences/Rodilius the other under Artistic/Rodilius.
Sequences/Rodilius does the fractal in an animation sequence.
David and i got together and created a pipeline for the code similar to Fractalius (Redfields filter).
It isn't exactly like it but can be used to almost mimic it.
Check it out by downloading GMIC here.
Another i am currently working on may possibly go into GMIC in the future also.
This is a side by side comparison.
For Flame Painter
and Chalk Painter possibly also.