#PB_AntialiasingMode_None: No antialiasing (default).
#PB_AntialiasingMode_x2 : x2 fullscreen antialiasing (FSAA).
#PB_AntialiasingMode_x4 : x4 fullscreen antialiasing (FSAA).
#PB_AntialiasingMode_x6 : x6 fullscreen antialiasing (FSAA).
But ...
1. there is no way to get if they are supported on current hardware.
2. x6 is something that current cards mostly doesn't support, its x8 and x16 instead
3. graphic cards support more options ("x8 Quality" or "NonMaskable" for example)
So the wish is a function, where we can get all from current
hardware supported FSAA modes and the possibility to set it

I have found this old topic in OGRE forum, maybe it is helpful:
http://www.ogre3d.org/addonforums/viewt ... =8&t=14584
MFG PMV