Try changing the light angle for this.
Why?
Incidentally, if anyone's curious the formula for this is the same as for Sittinglight's recent posts: mandelbox for several iterations, followed by one spherefold, followed by folding int power for ten iterations, wash, rinse, repeat.
Or:
Mandelbulb3Dv17{
V.....M....q....E4........Uwn6OWDah5.XMVfDA8Ls.EeOG1Yg6ZNz1UzLS18XPmzg2QcTewSu/k
................................0RGknnq0E/2........Y./..................y.2.....
................/M.0/....6kT4...W/....E0.....siEUHENoOlD/..........m/dkpXm1.BnAn
x.EnAnQD12../2......................OaNaNaNaB.A............u1....y1...sD...../..
.w1...sDip65a8jHyvfXEf3m9QK3zoID7LLwz8ejnAz8GihM/wPrG133EjrtymxlFx2d2HlDq1Kj50iX
HwnzDoaWN8zyyI.A4zf8N7kD......IY..............kD.2....sD..kz....................
.............ckpXm1...sD....z.lRsD.grVz.EV5y1.DSsD.YtVz.kc5y1.hSsD......A.....N.
................6zDY/wzzz1EY.M7.f....61...UB....U0.06w...UE/....J....cW0..EiJFz/
...U.0aZczDM6/nzMg2czX6dE1..0c..zrhe..UoK/nl2xvj.sM93P58iz1...........U.8.UQgk0.
.wUmc2beYz1.dA8E5Exwz0..........36.3xzzzz1..OhytTU7vz.kTadEdO/xD.UUU3BPr2zP/lcEz
uUXA...bqQf.DuyD.cIDN9w5Fz1.K16adRghzKEA8oDU.06..YKaZ6Aeiz1.58nQJ6Tnz.ERpBK.iAwj
Z6W0.s6XP0..uhKcpvxpz..6wxLO57zD.EwbNQR2U.A..2wOH/EPjR8.KkExqi6..1Ak.614vj7F.UDn
5/UGYovaL0kaqa9.qymdup4.lFOb.IQDyl5a.oqdl/kc93cTK0ETee4.2a3V187.iieN.gsN5ubZ.gbf
a/UapFuQl/.MiK9....y3q/.zz/k.1A.yz1yAT2.xzpaqa9.................................
E....A....E/....2....A....EEh3aSdtqNU6oPs/UQ..........................k/9.......
.....................FVf53iSIMyDOaNaNaNatz1.....................................
................................................................................
.....................2.....3..../....wpIkVKNmJaFjl4NdtqNl.......................
6..............................E........kz9.....................................
................................................................................
................................8....M....k.....4x4PYZaPb/GGiF56ExqR............
..........U0.U............................2........6.fNaNaNaNC.E........kz1.....
................................................................................
............................................}