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While not really general image scaling, there's a lot of work being done on post-processing in emulators to try to emulate CRT displays (like the aperture grille) or even the quirks of NTSC.

http://emulation-general.wikia.com/wiki/Shaders_and_Filters




Heh, it mentions that noone can emulate yet shadow mask CRT.

Those are what I mention in my article (TVs that have triangle pixels composed of 3 circles)

I never use current CRTs emulation because I guess I never saw TVs that could be emulated, I think all CRT TVs I saw consoles running were of shadow mask type, having almost no scanline (and I was a curious child that used to put amplifying lenses in front of TVs to see their pixels...)




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