Technical data for this type of fractal : click here.
For the fractal here :
fn1=th, fn2=ident, fn3=ident, fn4=ident
real(p1) = 3, imag(p1) = 16, real(p2) = 0, imag(p2) = 0, real(p3) = 0.4, imag(p3) = -0.687999999
Note : the image changes drastically if the value of imag(p3) is slightly changed.