I actually started work on the LumaSharpen shader because I didn't like how the sharpener in InjectFXAA looked in Skyrim. That's how I got into shader programming.
It cannot measure up yet (but hopefully someday) to the popular avisynth sharpeners but they can't run on GPUs and none of them are anywhere near as fast as LumaSharpen in SweetFX. Even compared to other shader sharpeners LumaSharpen is extremely fast.
I'm quite happy with it.
No no.. thank you for SweetFX. It helped with Skyrim visuals tremendously for me, and sooner or later I am going to start messing with it in my other games. I had no idea you hang out in here hehe. I picked it up of course on the Nexus, and then went to guru3d to follow the progress more closely.