I returned to this technique today after some years pause. I really like the chaotic and fractal nature of the pictures. Liquid but not too dilute acrylic paints mix and swirl according to the laws of nature, and these patterns can be easily observed in nature. Skin of a tropical fish or Sahara sand dunes? They can have the same structure. "As above, so below" said Thoth on the Emerald Tablet of knowledge many thousand years ago.The mathematical description of these phenomena became possible only a few decades ago, when Benoit B. Mandelbrot discovered and called them fractals.