TITLE: Wada
NAME: Paul Bourke
COUNTRY: Australia
EMAIL: pbourke@swin.edu.au
WEBPAGE: http://astronomy.swin.edu.au/pbourke/fractals/wada/
TOPIC: Worlds within Worlds
COPYRIGHT: I SUBMIT TO THE STANDARD RAYTRACING COMPETITION COPYRIGHT.
JPGFILE: irtc_sub.jpg
RENDERER USED: 
    Tachyon

TOOLS USED: 
    Photoshop for image cropping

RENDER TIME: 
    about 10min for 10,000 x 10,000 pixel image

HARDWARE USED: 
    Dec Alpha ES40

IMAGE DESCRIPTION: 

This self similar fractal has what is known as the "Wada"
property, that is, each point on a basin boundary is also
on the boundary of every other basin. This extremely
simple and elegant 3D model has a "Worlds within Worlds"
property to an infinite extent.

DESCRIPTION OF HOW THIS IMAGE WAS CREATED: 

Consider 4 perfectly reflecting spheres arranged so each
sphere is touching the other three (tetrahedral). Shine
a coloured light into one of the gaps. The light will
exit a gap depending on its incident angle, the pattern of
exiting light is the basin boundary for that gap. In this
image three lights are placed outside three of the gaps
and the camera looks into the remaining gap.
For more details see
   http://astronomy.swin.edu.au/pbourke/fractals/wada/

