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Description
English spelling is not the most logical of things, my dictionary has subtle, subtil, subtile and suttle all pronounced in the same way.

The central part of this picture rotated through 90 degrees can be seen in more detail and different colouring below:

Parameters

Formula: Uzduccpac Julia

z <- (unsign(z)/unsign(beta))^alpha + beta

alpha = 0.7 - 1.3i
beta = -1.6 - 0.9i

bailout limit: 1600
maximum iterations: 50
image centre: 0 - 0i
long side: 64

outer colouring: all points are inner
inner colouring: absolute log of ratio, norm(z) divided by abs(imag(z)), average

Created using mars and expanded using phobos (see my deviantID).

Description
English spelling is not the most logical of things, my dictionary has subtle, subtil, subtile and suttle all pronounced in the same way.

The central part of this picture rotated through 90 degrees can be seen in more detail and different colouring below:

Parameters

Formula: Uzduccpac Julia

z <- (unsign(z)/unsign(beta))^alpha + beta

alpha = 0.7 - 1.3i
beta = -1.6 - 0.9i

bailout limit: 1600
maximum iterations: 50
image centre: 0 - 0i
long side: 64

outer colouring: all points are inner
inner colouring: absolute log of ratio, norm(z) divided by abs(imag(z)), average

Created using mars and expanded using phobos (see my deviantID).