This picture has been made by writing original C++ code on a computer, where the colours were chosen with the same creativity and freedom that an artist uses when confronted with a blank canvas. It is of a fractal nature created with a directed graph iterated function system.
Much larger canvas or paper prints can be created if required, with no loss of quality.
For more information:
https://gcboore.com/pages/dgifs8d-fractal.html
https://gcboore.com/