Here is a view of the four dimentionnal M-set (z = z^ 2 + c). The
four parameters are real(z), imag(z), real(c) and imag(c). The
imaginary coordinate of c slides from -0.9 to 0.9. The increment is
0.05. The fractal rotates around the y (vertical) axis at 5
degrees/image and accomplish half a revolution during the animation.
As it rotates, it's a bit difficult to say where the other axis are.
The vertical axis is the imaginary coordinate of z and the real
coordinate of c go through your screen at the beginning and at the
end of the animation. The real coordinate of z is orthogonal to them.