Additionally, AA should be displayed and worked on with MS PGothic at exactly 16px height. MS PGothic DOES NOT display AA correctly at other font sizes, the spacing ends up different. Please use an AA test pattern of some kind to make sure that all lines that should be vertical really are vertical, to ensure your fonts are correct.
The "OH NO!" thread on here has some great AA for use as test patterns. For example, all the vertical lines in
https://4-ch.net/ascii/kareha.pl/1122749682/21 should be perfectly straight if you have your fonts set up properly.
Anyone committed to making AA should really download an AA Editor. It's a massive help, at the bare minimum you get mildly more convenient copy and pasting, and (most importantly) they highlight spacing errors for you. The two I've tried and recommend are OrinrinEditor and (´д`)Edit. Be warned, you may need to use a Japanese locale for them to work correctly.
*** RELEVANT LINKS ***
https://yaruo.fandom.com/wiki/OrinrinEditorhttps://yaruo.fandom.com/wiki/%EF%BC%88%C2%B4%D0%B4%EF%BD%80%EF%BC%89Edithttps://aa.yaruyomi.com/(Other AA fonts than MS PGothic exist, but they differ from MS PGothic in a number of subtle ways that can ruin your AA. Of all these fonts, the only one I know of that *exactly* matches MS PCothic (at least, for all AA I tested) is Saitamaar, which is what
https://aa.yaruyomi.com/ (an excellent AA resource that I highly recommend) uses, though the webfont only seems to load on Chrome. Saitamaar correctly shows AA at 16px, and in Chrome even scales properly (as in, it preserves vertical lines when zooming in). Still, stick to MS PGothic, you're less likely to run into problems. Also, the "classic choice" of Mona Font does not display all AA correctly, on the rare occasion it will use a different width for certain chracters, be warned.
I'll probably write some more about the font situation a on the new tanasinn wiki (tanasinn.vip) someday, though most (all?) of this is utterly irrelevant and confusing if you're just interested in making AA and have no font problems.)