I recently downloaded the latest version of Toribash to test on my new computer, and it looked and ran great, but I wanted more FPS. I noticed that Anti-Aliasing was forced on, so I looked around to try and turn it off.
I tried -aa 0 and... well:

I tried seeing if I would end up being forced to play with shaders OFF or with regular Anti-Aliasing, but lo and behold, I got THIS:

I don't really want, nor need Anti-Aliasing, I just want to play smoothly and look decent as well.
Turning Anti-Aliasing on prevents this from happening, as it looks perfectly normal.
Then I tried -antialiasing 0 and for some reason, beyond my ability to comprehend:

Any ideas why this happens?

CPU: AMD Turion(tm) II Dual-Core Mobile M500 (2 CPUs), ~2.2GHz
RAM: 8192MB RAM
GPU: AMD M880G with ATI Mobility Radeon HD 4200