Witcher 3 Custom SweetFX Shader

This is a shader for Witcher 3. I started with trying to reinstate the sharpen the game had during it's demo. I wasn't happy with how a blanket sharpen just sharpened everything, so I made it sharpen the centre of the screen much like an inverted Vignette. It's similar to the way Adobe does a sharpen in say Photoshop, and by extension, similar to SweetFX's LumaSharpen. I actually used some of the LumaSharpen texture fetching methods to make my sharpen and I am also going to add my Gaussian sharpen I used in Unreal to it at a later date. The nice thing about the way I apply the sharpen is it misses the main UI on most games so it isn't intrusive.

The shader also does contrasting, brightness and saturation. The shader should be light on resources, I'm noticed no issues during profiling that would suggest a problem.

It would be awesome if someone could make presets for this as I'm really bad at it.