Antialiasing on rounded corners about i3 HOT 1 CLOSED

While there are ways to make the rounded corners of borders anti-aliased it wouldn't be possible to round the actual window with anti-aliasing. It's only possible to do on the borders because they are drawn, while the rounding the windows requires masking them which doesn't allow for any level of opacity. I'd rather use the same method for both the window and the border to remain consistent, but I'm sure someone else could figure it out.

Alternatively you can take a look at the work being done on the compton fork picom. It isn't a full proof solution, but it makes the AA corners you're looking for.

from i3.