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Black Mesa



http://www.fractalforums.com/index.php?action=gallery;sa=view;id=8490

The DwellGrad coloring method can be used on Julia sets as well. It works best on connected ones though; disconnected ones have a topological defect at the critical point and all of its preimages (a "cone" around which the colors circle in reverse order; the smoothed iteration curves have saddle nodes here and the grad having these conical singularities is therefore actually legitimate, but it spoils somewhat the embossed-fractal effect when there are these extra, isolated embossed points in the image).