! 9 Spinning Apples Shader !

WHAT IT DOES
  Neon world .... textures are gradient-mapped into a drifting full-spectrum neon palette
                  (each cube face direction gets its own hue, like faceted jewels)
  Block edges ... every block gets a glowing neon wireframe; rings of light pulse outward from you
  LED pixels .... up close, every texture pixel becomes a little glowing LED bulb
  Fractal sky ... a Mandelbox-style fold iterated on the view direction: razor-thin neon
                  filaments on a dark violet void; stars twinkle in rainbow colours
  Prismatic fog . distance fog is the sky itself, so the world melts into the fractal
  Glow .......... 3-scale bloom, the widest halo split into a rainbow fringe,
                  white-hot cores, edge lens-blur and chromatic aberration
  Extras ........ iridescent oil-slick rims, caustic-ridge water, rainbow lava,
                  rainbow block-selection outline, neon rain/snow/particles, aurora clouds