I have added detailed shots to http://code.newtypography.co.uk/?p=898
At 400% magnification the difference does not look so great, but at 100% the difference in rendering is noticeable. I'll leave hinting interpreation to the experts, but to my eyes the vertical extremes of curves are not being flattened quite enough, thus creating extra sub-pixels (see the 400x magnifications). This seems to be the opposite of what is happening at other px sizes where the vertical extremes of curves tend to get overflattened, e.g. the 'O' at 15, 19, 21px.
-vern
On 18 Jun 2011, at 04:42, Werner LEMBERG wrote: Of note is that at larger sizes (20px - 30px) the rendering breaks up
on curves. Is it possible that the autohinter is not yet set to
instruct those larger sizes?
What do you mean with `breaks up'? Please give more details what exactly you think is bad. The hinting range is set to 8ppem-1000ppem, BTW, so these sizes are covered.
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