Exporting to OTF font with Regular results in a weight of 500

[matteopolak]

When exporting to an OTF font using a font-style of Regular, the weight of the font is 500 (instead of 400). This is the same result as using Medium (also 500), which seems to be strange and likely unintentional?

I tried using Light to hopefully get a weight of 400, but it correctly exports as a weight of 300.

[mattlag]

Thanks for the note - OpenType.js, which we use to read and write font files, has limited support for metadata. I think an immediate thing you could do as a work-around is to open your exported font in something like Font Forge that has full metadata writing support, then you'll be able to adjust any value you want.

I did confirm - OpenType.js defaults Regular to equal 500. It does look like with a bit of work I can update Glyphr Studio to pass more metadata to OpenType.js, basically enabling some additional OS2 table values, namely usWeightClass in this case.

For my reference, here's what OpenType.js supports:

Here are the defaults they are using:

[matteopolak]

That seems to have worked, thanks!