I found out how to use AA in your finished FPSC game,just do this simple task:
Export your finished game.
Open up your graphics card panel(this is for NVIDIA).
Go to programme settings and click add.
Find your game in the list and click it.
Go to antialaising-mode and click Override any aplication setting.
Go to antialaising-setting and crank it up to x16.
When you start your game it should now look fantastic without that horrid stepping effect.
This only works with a finished game as i cant figure out how to do it for a preveiw,hope this helps.
Your signature has been erased by a mod please reduce it to 600x120 and no anim.