I'm sure Corel or one of the graphics programs could do it.
But here's my questions because I really want to understand this:
If you're going to have "distorted" blocks on the bottom, won't you still want the triangle edge points to still match up to the neighboring blocks?
So here are some Kaleidoscope blocks created using the custom set of EQ.
See how the first 2 blocks on the first row, with different widths, still match up side to side, so the color flows smoothly. When you get to the 2nd row, see how those blocks don't match up to the blocks in the first row.
So it's kind of hard to distort each block differently (unless you get into curved edges) and still have the pattern go across the quilt top fluidly.