Running a website called Dead End Thrills (about pictures of grafix), I spend a lot of time playing with visual mods. When PCG asked me to list my favourites from 2012, I agreed thinking I could do it in the style of the prize round from Bullseye. "You'll be up all night 'cause it don't look like shite." "Act well-heeled with this depth-of-field." But that wouldn't work overseas, they said, and stopped being funny after two examples.
Here's a straightforward top ten, then, in no particular order.
Battlefield 3 screenshot by Jim Snook (jim2point0)
No sooner had Nvidia's Timothy Lottes introduced FXAA (a 'fast approximate' antialiasing solution effective, unusually, upon deferred rendering and shader aliasing) than 'some dude' (their username - bet it's a lady) weaponised it into a DLL injector for most DirectX games. Copy it into the same folder as the game's binary and it hooks the calls to DirectX, softening the edges most AA methods can't reach.
Then things got interesting. Tonemapping, digital vibrance, luma sharpening and other neat effects got thrown into the mix, giving us the power to customise the look of most modern games. It's also one of the most reliable, no-nonsense screen capture tools: just hit your assigned hotkey and a lossless image plops into the game's folder.
Christian Jensen's SweetFX is the next evolution. Using SMAA for antialiasing, its features include S-Curve contrast adjustment and a filmic Cineon DPX treatment. Popular presets for these injectors include the Mass Effect 3 'Illumination' mod and James Snook's work with Borderlands 2 and Dishonored. When it comes to cheap, powerful tweaks to colour, image quality and luminosity, PC gamers have never had it so good.