Code to go with: http://low-sugar-eye-candy.tumblr.com/post/133875924120/hey-man-i-really-love-your-work-how-did-you-come

forest.rb

# requires jruby_art gem and Processing3 to run
# run with: k9 run --nojruby forest.rb 

def setup
  @images = Dir.glob("resized-*.jpg").map { |file| load_image(file) }
  @pixels = @images.map { |i| i.load_pixels; i.pixels }
  noise_seed 130
end

def draw
  sketch_title "frame #{frame_count}, #{frame_rate.to_i} fps"
  image @images[0], 0, 0 if frame_count == 1
  load_pixels
  sz = @pixels.size
  psz = pixels.size
  z = 1 + sin(frame_count / 10.0)
  0.upto(psz - 1) do |i|
    x = (i % 500) / 100.0
    y = (i / 500) / 100.0
    n = noise(x, y, z)
    j = n * sz
    pixels[i] = lerp_color(pixels[i], @pixels[(j + frame_count/TWO_PI) % sz][i], 0.3)
  end
  update_pixels
  filter ERODE

  if frame_count <= 20 * TWO_PI && frame_count > 10 * TWO_PI
    saveFrame "#{Dir.pwd}/filename-###.png"
    p saved: frame_count
  end
end

def settings
  size 500, 334, JAVA2D
end

The effect: