Just for fun I've built a sample of the 4th Iteration. It looks nice in preview, but the font generated by the Fontmortar is useless. It may have pushed the envelope too far.

Thank you for your comment and the TP. A good choice for the cover of Gödel, Escher, Bach? Well, that's quite a compliment. I love that book.

I can only hope I am the first with this fractal type concept. There are some examples of letters-in-letter design, but not in fractal fashion.

I thought about the space glyph too. Actually, there should be a black & white pair a space glyphs. What pattern could it be without compromising the period and other punctuation marks I can't tell right now. I still have some problems how to accommodate B&W pairs of glyphs within the same font. I think, I should learn more about Open Type.

4th Iteration: A very good question. Back in August, when this idea came I've made a lot of calculations. It is easy to compute the size of a glyph in bricks:

1st Iteration: 2x4=8

2nd Iteration: 8x16=128

3rd Iteration: 32x64=2048

4th Iteration: 128x256=32768

Next: Renault Octant 3rd Iteration

Next: Renault Octant 3rd Iteration