Hi, you got any example-pic/link for "fluted"?? I didnt/dont know that exact expression and suggested only according to buddhas explanation. That thingie in Bryce4 is built of Booleans, like buddha described. But it doesnt seem "fluted"? Now, I am interested, how a fluted anything loooks like! ;-) Hubert

"All that we see or fear, is but a Sphere inside a Sphere."     (E. A. Pryce -- Tuesday afternoon, 1845)