Recover font antialias on Yosemite I've changed some options related to font rendering by defaults write command in past (I can't recall was it lcdfilter, or something else).
Now when I turn off antialiasing in system preferences font are still looks antialiased, but have less weight (see screenshots).





Note, I have Retina display, so, this could be normal behaviour, but I'm not certain, that's why I decided to ask about it.
If this is not default behaviour (it seems to me, that fonts too heavy when antialiasing turned on), how can I rollback changed values to defaults?
You can change the amount of font smoothing with the following command:

defaults write -g AppleFontSmoothing -int [value]


[value] is a value between 0 and 3 inclusive. Requires log out and log in.

Here's a gif by Lauri showing the difference: