I've been using CAS in Reshade for a year now and have been pretty happy with the sharpening it provides without halos, or a big FPS hit. The original CAS shader was done with basically the same code that AMD had been using for sharpening, and Nvidia was also starting to add into their driver at the time. I recently noticed that a refinement of the CAS shader that provided more control over fine details was available, and I like it a little better than the previous version.
Stock AnKor's Shaders on the left, and AnKor's with the New CAS shader in Reshade on the right.
I think it makes the details a bit more distinct without looking too artificial.
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