More info about the options and config file: .CFG FILE OPTIONS: First, see this link: http://community.bistudio.com/wiki/arma2oa.cfg for complete explanation of options configurable by editing the cfg file. Of note are those: ATOC: (Alpha To Coverage antialiasing) - makes distant trees look better (YMMV) by dithering the texture. Some hit on performance. It's a briliant solution though. You can get better performance by turning it off though. Default is ON. ATOC ON: http://s1.directupload.net/file/d/2607/7ad5mepz_png.htm ATOC OFF: http://s1.directupload.net/file/d/2607/qpnluwdg_png.htm (credit to Brainbug) FXAA/SMAA: This differs depending on if you use 1.60 retail patch or 1.61 beta patches. Basically both are post-processing antialiasing, meaning the AA is done on a finished frame instead of during rendering like normal MSAA. Both are much less computing intensive than MSAA, and you don't have to have MSAA enabled to use it. Quite nice! If you have non-beta 1.60: use FXAA= (see link) and FXAASharp= (dtto) for antialiasing level and sharpening filter. If you have latest beta 1.61(recommended! because of direct chat bug fix etc): use PPAA= and PPAA_Level= (dtto). Difference between FXAA and SMAA: FXAA applies a smart smoothing filter to whole rendered frame (detects textures and some edges not smoothing them) for a reasonable compromise between jagged and blurred, with optional post sharpening. SMAA applies a smarter filter which is a bit of hybrid between traditional AA and post-render FXAA. performance hit (high>low): MSAA > SMAA > FXAA. I prefer SMAA and no MSAA myself. INGAME options: Post processing effects. Things like motion blur, Depth of Field shader, bloom, and SSAO (ambient occlusion). to quote Maruk, BIS CEO: "Disabled: color corrections only Very Low: Disabled + filmGrain + radial blur + dynamic blur Low: Very low + bloom + rotational blur + other scripted post process effects Normal: Low + DOF + lowest SSAO High: Normal + medium SSAO VeryHigh: Normal + highest SSAO Also, disabled - low primarily allows you to customize game appearance, Normal - Very High is heavily affecting performance but SSAO quality is the only difference."