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The new Cascadia Code update has both braille and octants. https://devblogs.microsoft.com/commandline/cascadia-code-240...

With the right font (e.g. http://viznut.fi/unscii/) and line spacing, braille characters work fine with an even distribution of pixels and no gaps.

That's pretty cool. Are there any terminals that ship with such a setup? Better yet, is it possible to override this behavior in your app? For example, could I make a TUI app specifically for plotting data, and have it select it's own font that's optimized for braille plotting?

I don't see a completely filled in octant. What character should be used for that?

I think U+2588 Full Block would work?

U+2588