Re-Interpolation issue

1

Hi Forum!

I am getting a strange result when I try to reinterpolate two regular masters. Here’s my setup:
Thin Compressed (wght=1 wdth=1) Stem width=5em
—Regular Compressed (wght=8 wdth=1) Stem width=XXem
Bold Compressed (wght=15 wdth=1) Stem width=75em
Thin Wide (wght=1 wdth=9) Stem width=5em
—Regular Wide (wght=8 wdth=9) Stem width=XXem
Bold Wide (wght=15 wdth=9) Stem width=300em

Now, when I create only the Regular Wide master(wght=15) and re-interpolate it, the resulting stems are calculated correctly, but as soon as I have the Regular Compressed too, the re-interpolated wide characters seem to match exactly the stem width of the Regular Compressed, and not the correct interpolated value.
If instead I generate the Master from the Regular export, it nails the interpolation, so I know that the coordinates are right. Any idea why this happens?

Thanks in advance for your time!

Screenshot 2025-05-12 at 14.02.14
Screenshot 2025-05-12 at 14.02.141624×584 47.6 KB

Screenshot 2025-05-12 at 14.01.31
Screenshot 2025-05-12 at 14.01.311800×592 37.9 KB

Correct one (generated from instance)
Screenshot 2025-05-12 at 14.01.43
Screenshot 2025-05-12 at 14.01.431772×518 44.2 KB

Wrong one (re-interpolated)

2

Could you send me the file?

And why do you need those two masters when you reinterpolate them anyway?

3

Sent!
I’ll need the intermediate masters to tweak most horizontal bars, after re-interpolation

4

Look into Intermediate layers so you only have to manage layers that you want to change, without introducing an entire additional master:

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5

I think Valerio is well aware of intermediate layers :grin:

For the sake of simplicity, it can sometimes be easier simply to have an additional master, instead of introducing intermediate layers to 100+ glyphs. Even if a fair deal might not need adjusting, it is still easier to manage the file that way.

1 Like
6

It might be easier to set it up, but later it is difficult to know what glyphs needed adjusting.

1 Like