Coolbean.fli is a nifty animation that provides a 
good demonstration  on the uses of threshold and 
radius values used in blobs.  Each pair of blob 
components are independent of each other, as shown 
with the different textures.  When the components 
are seperated, each pair seems to have the same 
threshold and radius, but when they come together, 
it's easy to see that there's a logical progression 
of thresholds and radii going in opposite directions.
Pretty nifty, huh.

Raytraced with POV-Ray
Variable substitution with Animdat
Targa animation with DTA (Dave's Targa Animator)

By: Jason Pratt
pratt@ncssm-server.ncssm.edu