You have have been viewing images of the Twin Light and Colour Cubes -
a remarkable pair of virtual entities - mirror images and photographic
negatives of each other - with dimensions of red, green and blue -
primary colours of light - or of cyan, magenta and yellow - primary
colours of pigment - that contain all colours. The colour at any point
in each cube is a three-dimensional sum of the coordinates of the point
- based on a simple three-dimensional mathematics of colour and light.