It is linked in the article Paul linked to above: https://typedrawers.com/home/leaving?allowTrusted=1&target=https%3A%2F%2Fcreativepro.com%2Fmake-a-font-contact-sheet-in-indesign%2F Direct link t… (View Post)
Ben Blom discusses their rationale for the 3333 UPM in the thread I linked earlier. They actually design in a 10K UPM and drop the precision to ×⅓ later. (View Post)
Ben Blom has done and shipped a bunch of 3333 UPM fonts for OT-CFF. I do not know of anyone who has done higher than 4096 in either format. (View Post)
Here are some old threads on high-UPM fonts: https://typedrawers.com/discussion/75/opentype-ps-with-2048-upm https://typedrawers.com/discussion/123/maximum-upm-for-otf-fonts/p1 (View Post)
I use this script occasionally. What I liked about the script is, working by GID means it does every glyph, regardless of encoding or alternate status. It does them in glyph ID order, which works wel… (View Post)