I saw some solutions as I searched, but couldn’t get a clear grasp…
I have brace layers, e.g. the /f, and while the function of changing the glyph shape works, the interpolation of side-bearings doesn’t.
In other words, the brace /f does have the interpolated metrics at first for the side bearings, but if I change the spacing on the other two masters, the brace /f doesn’t update the metrics unless I tell it to re-interpolate… but when I do that, I lose the glyph shape that I’ve tweaked, as it reverts back to the original shape. (The side bearings all have the same metric keys.)
Is there anyway to update/reinterpolate the brace layer metrics only?