A particle level of detail system that I created for our FIEA capstone game, Grapple. Our game uses many, MANY particles, but they were slowing the game down significantly. With this new system, we can use many more particles than we could before with a MUCH better frame rate than using just a few particles without this method.
Smoke particle and particle LOD system by Adam Grayson
Fire particle by James Diab
Amina rig by Robert Campbell