Here is an overview of some tools I built while creating painterly materials. Those are setups I use quite a lot and turned into tools to speed up my work. I still have some tweaks and features I would like to add before releasing those if it interest anyone. But I hope it give some insight about my process.
None of those are magical filters that will turn something into a painterly surface but they can help streamline some steps of the process while giving consistency and speed.
Little Bonus, some of those tools working in photoshop using the parametric filters :) .