I love these sort of designs. What did you use to obtain this?

i started with a fractal.(from this pack http://www.gimptalk.com/forum/4-fractal ... 33347.html )




then a kaleidoscope filter +
duplicated the layer flipped horizontally the dup and merged down in lighten only mode


followed by mathmap Droste
(sorry i can't find this.. was only 1 big vortex )

last i run very simple(no preview no dialog ) but surprising PS Filter ("Centre Tile" by "Simple") that basically multiply the original Vortex (that was 1 )and make everything seamless (well i didn't try to tile but looks seamless )