This file shows which file evolved from where.

cafe_wall.c
   distortion.c

circular_moire.c
   linear_moire.c
      linear_moire_bw.c
   circular_moire_bw.c
   circular_moire_dither_bayer.c
      circular_moire_dither_fs.c
         circular_moire_dither_atkinson.c

fractal_slow.c
   fractal.c
      fractal_bw.c
         fractal_bw_inverted.c
      fractal_constrained.c
         fractal_constrained_bw.c

halftone.c
   halftone_multilayer.c

hex.c
   hex_bw.c
      hex_pattern_dots.c
         hex_pattern_stripes.c

random.c
   random_bw.c
   perlin_noise.c
      perlin_noise_bw.c

stripes.c
   stripes_generic.c

swarm.c
   trail.c
      trail_gradient.c
      trail_multi.c

voronoi.c
   voronoi_4colors.c
      voronoi_4colors_bw.c

worley_noise.c