|The choice of colours||Return|
Generally, a fractal picture is generated in two steps:
The theoretical number of possible choices is breathtaking.
Even this number is so great that it no longer makes
sense. It is roughly 10**2000 (10 to the power 2000) in the case of
from 1 to 1000 to be mapped over 256 colours. If one could consider a
thousand million choices per second and if one had begun at the Earth
birth, only 10**25 choices would have been examined so far
nearly nothing compared with the total number.
The two pictures below show what may happen when the colouring is messed up (with Mandeltour, one had to make it on purpose!). On the left, the center area is filled with a shapeless pulp. On the right, the image is more readable but lacks strength.
It must be emphasized that there is no unique solution for the colouring. Below are four of them, very different, but as valuable in my view as the top image in this page. To tell the truth, I do not like very much the acid colours of the top left picture, but I accept that some could be fond of them.
Finally, the choice of colours for Mandelbrot pictures can be very easy when one is using a program with well-designed colouring functions. I shall refrain from too rapidly generalizing this conclusion to any kind of fractals. Some of them look quite more complex, and their colouring could be intrinsically more difficult (I am not sure of this, for lack of experience, but I suspect it). On the other hand, the programs like Fractint are not renowned for their ease of colouring. This does not prevent from getting very fine results with them but overcoming this practical difficulty should not be considered a bonus in the artistic value of the picture.
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