Hello Brad,
> On this issue, I’ve noticed a particularly egregious example in the > past few days: around 20 ppem, with autohinting enabled, ⟨ñ⟩ in Noto > Sans Regular consistently renders with a horizontal bar, so as to be > indistinguishable from ⟨n̄⟩. As Werner mentioned some time ago, this > particular character may not be a huge problem in practise, but it > would be nice to get this fixed nonetheles. I note especially that > --- at least on my machine --- popular sites like Wikipedia and > Reddit render in precisely this font at that size. I think – hope – this is on Craig's plate :-) And yes, the tilde character needs special treatment, i.e., a vertical exaggeration of the shape for small sizes to retain the wiggle. Werner