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attached frag uses one or two iterations  of darkbeam's invCylindrical to deform an Abox

can be tricky to use, but creates different detail.

this frag is  box fold, spheFold, scale, rot,  add constants  then invertCyl

but it can be set up with extra possibilities by adding in a second add constants

.....
rot
z += c3A + cJuliaA     (where c3 =  vect3 addCpixel * vect3 addCpixel multiplier,    and cJulia is just a vect3 offset)
invCylind
z += c3B  + cJuliaB