Here are some ideas for other fractal designs.
45degree design using squares 




Penrose tiling uses 36degree pieces 










There are other transformations besides the ones I listed. Many have the common property that the scaling size of the substitution tiling is the same for all the transformations. Many use the Yshaped star.
Other transformations are possible that scale by a larger scaling factor. There are many possible other scaling factors. The following diagram shows some possible sizes of diamonds in the substitution tiling.
The first row shows the basic diamond. The second row shows the bigger diamond D_{1} used in many of the substitution tilings on this site. The third and fourth diamonds are slightly larger. A problem with using these as substitution tilings is that the sides are not symmetric, i.e. there are ways to put two sides together and not have the pieces match. The fifth and sixth diamonds solve that problem. In fact, the fifth diamond has size of D_{2} in many of the tilings on this site. The sixth diamond is the diamond D_{1} used in the 12 pointed star fractal. Besides these 6 diamonds there are, of course, larger diamonds.
Larger scaling factors may allow more than one possible tiling of a piece. Using multiple possible tilings in a pattern would create some new designs.
You don't need a complete substitution tiling for a fractal. Since the fractal has holes, fractals don't need to be based on complete substitution tilings.
One design used a different piece (the X), but those pieces cannot be used for a substitution tiling. Other pieces could be invented compatible with the pattern block pieces that provide other fractals.
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Copyright 19982004 by Jim Millar