Alternate Layer works in 'Variable Font Test HTML' but does not in Illustrator

I have a single glyph with an alternate structure setup as so:
Screen Shot 2023-08-21 at 11.17.03 AM

When I use Rainer’s ‘Variable Font Test HTML’ script, the font performs as expected. When I check the specific glyph in Illustrator, it seems to ignore the shape switching.

Do I need rlig OT feature when using the Alternate Layer feature?

EDIT: I tried using Alternate Glyphs instead of Layers, with an rlig feature setup as so:
Screen Shot 2023-08-21 at 12.28.50 PM

Still not working in Illustrator.

Try rvrn.

Tried using the rvrn OT Feature with the above code, as well as adding a Font → Custom Parameters: Feature for Feature Variations pointing to rvrn Still can’t get the variable export to behave as desired in Adobe.

It works in InDesign, no?

Illustrator’s implementation is surprisingly buggy. I’ve been told there was a little improvement in the latest version but haven’t verified myself.

Ugh, noted regarding Illustrator’s buggy VAR support.


That’s why I thought rvrn would work. Perhaps a more common feature that AI supports out of the box? But my hopes are not high.

Would it be smarter then to go back to using alternate layers and only test that it works in InDesign (for Adobe apps)? I see in the Changing Shapes tutorial it says “change the Feature Variations feature only if you really have a good reason”

Is there a specific place we can voice our interest in this buggy support getting solved?