What is it?
So in case you're new to SweetFX Shader Suite (or just SweetFX), it's a mod built on the InjectSMAA shader injector, that allows you to apply a suite of post processing shader effects to your games.

You may have tried another shader injection mod before, like InjectFXAA, InjectSMAA or FXAAtool. SweetFX improves upon all of these.

You can add SMAA anti-aliasing , sharpening and tweak the color, gamma , exposure and more.
It's meant to allow you to improve the look of your games and change the look and mood of it to your liking.
If you use SMAA antialiasing instead of MSAA or an even more expensive antialaliasing technique you can also make the game run faster (than with MSAA)

Effects included:

SMAA Anti-aliasing : Anti-aliases the image using the SMAA technique - see http://www.iryoku.com/smaa/
Cartoon : Creates an outline-effect that makes the image look more cartoonish.
Advanced CRT : Mimics the look of an old arcade CRT display.
LumaSharpen : Sharpens the image, making details easier to see
Bloom : Makes strong lights bleed their light into their surroundings
HDR : Mimics an HDR tonemapped look
Technicolor : Makes the image look like it was processed using a three-strip Technicolor process - see http://en.wikipedia.org/wiki/Technicolor
Cineon DPX : Makes the image look like it was converted from film to Cineon DPX. Can be used to create a "sunny" look.
Monochrome : Removes colors from the image so it appears as if shot on black and white film.
Lift Gamma Gain : Adjust brightness and color of shadows, midtones and highlights (avoids clipping)
Tonemap : Adjust gamma, exposure, saturation, bleach and defog. (may cause clipping)
Vibrance : Intelligently saturates (or desaturates if you use negative values) the pixels depending on their original saturation.
Curves : Contrast adjustments using S-curves.
Sepia : Sepia tones the image - see http://en.wikipedia.org/wiki/Sepia_tone#Sepia_toning
Vignette : Darkens the edges of the image to make it look more like it was shot with a camera lens. - see http://en.wikipedia.org/wiki/Vignetting )
Dither : Applies dithering to simulate more colors than your monitor can display. This lessens banding artifacts - see http://en.wikipedia.org/wiki/Ditheri...age_processing )
Border : Makes the screenedge black as a workaround for the bright edge that forcing some AA modes sometimes causes.
Splitscreen : Enables the before-and-after splitscreen comparison mode.

It works with all 32bit DirectX 9 , 10 and 11 games (and many applications).


Compatibility
It works with all graphics cards as long as they support at least shader model 3. That's all cards produced after 2002 (give or take).

It does not work with 64bit game executables yet, however 64bit support should be coming in the near future - so far use the 32bit version of your game if it gives you a choice between 32 and 64bit.

It should work on Windows 2000 and newer, both 32bit and 64bit. So far tested working on WinXP , Vista , Win7 and Windows 8.
It may work on Linux using Wine - please report your findings.

It does not work well with most programs that overlay an image onto the game. It has a workaround for the Steam overlay so that will work, and you can make overlays based on Rivatuner OSD work as well with a compability setting in those overlays , but other overlays may prevent SweetFX from making changes to the image or outright crash the game - turn those off.