Edit: Pull request sent (just .coffee as requested).
Looks AMAZING in webkit browsers! Sadly in firefox I get "jaggies" on the diagonal edges due to the lack of antialiasing.
I noticed that adding a transparent outline (outline: 1px solid transparent;) to the class ".oridomi-mask" I smoothed these jaggies. Although they look better they still aren't quite as crisp as webkit.
I assume that is because when you add an outline, the whole thing becomes the texture and the texture filtering is better than no anti aliasing it is still worse than properly rendered polygons.
Looks AMAZING in webkit browsers! Sadly in firefox I get "jaggies" on the diagonal edges due to the lack of antialiasing.
I noticed that adding a transparent outline (outline: 1px solid transparent;) to the class ".oridomi-mask" I smoothed these jaggies. Although they look better they still aren't quite as crisp as webkit.