As Technical Artist Safar Isaev, also known as Sofar, explained, he developed this project purely for fun and as a learning exercise in Unity's indirect instancing, saying that it was easier for him to write the system from scratch than to dive into the complexities of VFX Graph.
This screensaver-like 3D simulation is highly performant: Safar optimized the 2 million body problem to run at over 60 FPS in the editor, even while recording simultaneously using a GTX 1650. The developer plans to post more updates on the project soon and hopes to include an Asset Store link as well.
In the meantime, check out some of Safar's previous projects and follow him on X/Twitter to stay updated on his latest work:
