From: utzoo!decvax!duke!harpo!ihnp4!ixn5c!inuxc!pur-ee!uiucdcs!uicsovax!pat Newsgroups: net.graphics Title: RTB refs - (nf) Article-I.D.: uiucdcs.1350 Posted: Mon Jan 17 22:29:12 1983 Received: Thu Jan 20 03:04:53 1983 #N:uicsovax:22000003:000:468 uicsovax!pat Jan 17 22:18:00 1983 I've had several requests for this... so For more information : Ref: Turner Whitted's "Raster Test Bed" "A Software Test-Bed for the Development of 3-D Raster Graphics Systems" Whitted, T., and Weimer, D., Page 271 of August 1981 issue of ACM SIGGRAPH, Volume 15, Number 3 Its cover has a very nice color graphic: "ARCH FRACTAL" . Patrick E. Kane, U of Ill, Computing Services Office, (217)-333-6262 L. Van Warren, Utah (utah-gr!warren)