This is a small galaxy (star cluster) simulation. I don’t think this can be done using particle systems, and I had to write about 200 lines of python to get it working. This is probably my favorite early test. Two star clusters contract to their local centers and then collide in a swirling chaotic dance. I plan on working a lot more on materials and the scene, but it is all real physics. Every frame each star has force vectors calculated for every other star in the system.
Galaxy Render #297