% This is partly a demo of lighting features and 
% partly a demo of the use of random parameters.

% 6 April 2000, Rob Scharein

Draw = f

satu = 0.0    % looks cooler if knot surface is white

light reset
light off 0

light define 1
light hcolour \rr360 1 1    % Random hue, but max saturation and value
light pos \rr[-30/30] \rr[-30/30] \rr[-30/30] 1
light on 1

light define 2
light hcolour \rr360 1 1
light pos \rr[-30/30] \rr[-30/30] \rr[-30/30] 1
light on 2

light define 3
light hcolour \rr360 1 1
light pos \rr[-30/30] \rr[-30/30] \rr[-30/30] 1
light on 3

Draw = t




