ok had a look in a hex editor
copyright 1987 to Blair-Sullivan and commodore
blair did other animations as well.
anyways also found this to
http://home.comcast.net/~erniew/juggler.htmlin the May/June 1987 AmigaWorld in which Eric Graham explains how the Juggler was created.
which he raytraced in scuplt3d just the demo says at the start how long it took to render.
The other eric draws by hand if i remember what i read a longtime ago .
So if load the demo and read the note and compare to that page it matches.
also in hex is says imported by cobra and supremancy all in 1987.
Hope that helps.
Hang on news flash another hex search found this 86, E. Graham 505 281-3184
at line 0002:D616
..86, E. Graham 505 281-3184.....6movie:movie.data.OpenWindow2.The individual frames of the movie are being fetched from disk. When.the movie starts you may press any of the digit keys '0' to '9' to.change the speed of the movie. Press the escape key 'ESC' to exit the.program..The images were generated with a standard Amiga with 512K memory. A ray.tracing method was used, which simulates rays of light reflecting within.a mathematically defined scene. Each image requires the calcula.......E.......è...m[q¢¼tion of.64,000 light rays and takes approximately 1 hour to generate. An image.is compressed to about 10K bytes for storage. Images are expanded in.less than 30 milliseconds. The Amiga hold and modify mode is employed.so that up to 4096 colors can be displayed at one time.. Press ESC for the CAT demo .NOW PRESS ANY KEY TO START THE MOVIE.
In the movie on page has a movie that is 100% the same even the same annoying beep .
U can scroll down on that link to see a picture of the demo which is the same as well .
U would think after the effort to render it they would have used a real sound sample :-)