Exploring ways to mipmap alpha-tested textures (lisyarus.github.io)

Neither can I. They look identical to me.

Look at the fourth one on the bottom, you can see the black splotches. It's not the best example I've seen, a quick search turned up this better example, notice how the edges become all dark: https://forum.shotcut.org/uploads/default/original/2X/e/edb3...