Antialiasing is finally implemented in Glow engine.
It's implemented by Directionally Localized AA algorithm,implemented in The Force Unleashed 2. It's operates in image space and works as post-process, finding edges by High-Pass filter and blur it with 5x5 (and 16x16 for long edges) kernel.
Looks cool .. my images long time suffered from jaggies .. not now)
Antialiasing is off:
Antialiasing is on: