Stefano, you have taken Ultrafractal in directions I have never seen before. It's no wonder several comments question whether this is all done with fractals. Some of the elements of the ship I can recognize, but other forms are not even in my fractal formula memory. I would love to have you explain your techniques on the Ultrafractal mailing list, but realize that they are your artistic "trade secrets." Even if some composite work was done, the results are stunningly artistic.