Animation Operations Particle Operation Used to apply a particle effect using a simple object as a model particle.   Burst Operation   Swirl Operation   Adjust Points Operation Used to animate points. A typical use for this operation is the animation of facial expressions.   Unlink Operation Used to unlink faces so that they no longer share points. When applied following a Burst or Swirl operation it permits their animation to be exported to the MD2 format and the Neutral Object Format.