Ray Ray Version
The Percolator app was just updated and it has a fun new “filter”. The Ray Ray blend creates geometric shapes, along with the circles. I like to use Percolator with my Inkpad drawings to give them more unique textures. Another filter that I like is the Tripstamatic blend because it has more neon and psychadelic colors. I usually create an app mashup with the Percolator app where I import several images into Sketchbook Pro to add and subtract areas that I like.
Original Inkpad drawing
Mashup using Inkpad, Percolator and Sketchbook Pro