anti aliasing wont enable

ok this is REALLY annoying. any pictures i take in gmod show up crappy and low quality and its all because the anti aliasing wont work. basically, the anti aliasing section wont light up/ is not selectable i cant open the drop down box or anything. all the other settings are fine. can anyone tell me how i can get it working again?

cheers.


(User was banned for this post ("wrong section" - postal))

launch gmod with the launch option


-dxlevel 98

[editline]4th September 2013[/editline]

Setting Game Launch Options

Remember to remove the launch option after you done it with once.

Use -dxlevel 95

98 is broken in GMod iirc

[editline]4th September 2013[/editline]

I know there are some bugs with it if it actually works