What's a "Burst"? Bursts are (more or less abstract) images created using a special technique in Bryce. I chose that name to distinguish these images from "Bloops" (see Jonathan Allen's great Volumetrics tutorial). Even though the results are sometimes indistinguishable, each technique has some very different possibilities. Notably, Bursts are highly conducive to weird geometry. Plus, Bursts are much easier on the ol' CPU - no volumetrics or complex terrains. (At least not yet, anyway!)

Check out some more small examples of Bursts!