black_hole warp
// pattern modifier
// (---black_hole warp---)
// local deformation of the pattern
warp {
black_hole <0.5, 0.5, 0>, 0.25 // position and radius
//strength 3 // strength of deformation
//inverse // invert effect
//repeat <1.5, 1, 0> // repeat black hole
//turbulence <0.1, 0.4, 0> // turbulate repeat position
}