The logical follow-up to the 90×90 and 91×91 is of course, 91×90. I won’t claim there is any real difference between the levels my program generates at these sizes (though, strangely, 90×90 is a lot slower than the others), but I’ve decided to stay around this size because I felt 120×120 was too big (the lines are too thin), the 80×80 remake is as good as any of the larger sets preceding it, and it takes a lot longer for my program to generate levels at 100×100 and larger.
The new gallery doesn’t attain the near-perfection (at least, in my own delusional mind) of the last set, but I think it’s pretty good in its own right and has it’s own unique feel compared to the other 4-5 image sets.