ParticleDraw is powered by a state of the art general system simulation engine. The brushes are dynamic systems of particles with interesting behaviours, which you can completely customise. Each brush is intricately tuneable with many underlying physical parameters and one can construct arbitrary systems of particles and use these as brushes.
This program is an initial software implementation of abstract mathematics that arose from metaphysical research. It is still in development and is evolving into a mathematically derived operating system for "general systems". It was inspired by system theory and ancient metaphysics and is essentially a fusion of esoteric mathematics with computer science. It provides a Reality generative process that manifests existential spaces with fundamental information theoretic properties Similar to our own empirical universe. This program is entirely free with full source code and detailed information on the website.