Concentricity
http://www.fractalforums.com/index.php?action=gallery;sa=view;id=10124Mandelbulb 3D 1.7.6
Messing with the Amazing Surf formula. I added the _Rotate formula just for fun.
My params:
Mandelbulb3Dv17{
V.....m....61...ET...2U...UOB/A5an4zzy0KBKrnnM1E3oGoW32qf.QelF3c91G..xCJpivI1MxD
................................fpBCp0F3/.2........B./..................7/2.....
................/s.1/....6EU1...52....EC.....Az4WqpwsFpD/.kFmpsD...U/dkpXk1....U
z.EnAnQD12../2EnAnAnAnUszoAnAnAnAHtjaNaNaNaNRz1............u1....y1...sD...../..
.wHnAnQD8RCRXXYS9q9NrdyKnX5BzwqO04kM31ajwec5DycjawPFbbI8YCyKy.8I9cry32nDGQBSvhT/
lw16g/iFC8eIyQgxposXyOmD......oL/.............kD.2....sD/.kz0...................
.............oAnAr1...sD....z.MRKE.6qN//.Pb32.qRKE..sN//UWb32.ISKE.VpDtDQ....k1.
................yzzz.wzzz1UX.66.Y/...61...US....m....c3...EB....O/...2KB...Ui94U
...U.8YL8yzlcisz0tZWzTAe90..oc..zzzz.g5MarH7iXyDWra4dabdnz1..........2278..IsY0.
......................6.........VAFKwjsSd/.......................0........E.0c..
W74U.kiJdtvvzczDtodIWOorVy1..........2U.8.EOTR2.BSLniVLOtz1.....................
JI01xH9OG/.305b792UvzaRdHng129vjjyDGa9yBPz9...8cU0.E./2.zz/cU08../2E.szDU08c..2E
./EzT/8cU0.E./2.Qs5cU08../2E..bTU08c..2E./.ly/8cU0.E./2.Mw5cU08../2E.kqTU08c..2E
./.kz/8cU0.E./2....cU08.zz/cU08.yz1cU08.xz3cU08..ELMmBLEiFaEV7rQ0RY9e/rN........
E....6....E.....I....U....EEh3aSdtqNUAJRmN4...........................k/.MU/4.U.
...........BnAnAnAbxz.......kQyDzzzzzzz1/.2......ke6./.......M0E.......UUz1.....
................................................................................
.....................2.....3....1....wZIjFLMoJ4.l..R............................
4MU/.........................M.k........2.2.......8B.1..........................
..iF./..................kz1.....................................................
................................}