this post was submitted on 24 Dec 2025
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That's actually the one I'm entirely on board with
Many retro games were designed to be viewed on a composite (or worse) signal CRT (particularly 8/16-bit consoles). They take advantage of the characteristics of those technologies to act as a final expected phase of image "processing". (It's a physical effect so not actually processing)
The games were never meant to be played with sharp, hard pixels. The lines were supposed to blur a bit to create a sum greater than the parts and create additional chroma and luma resolution that isn't possible with the console hardware in isolation.
OTOH it actually has to be a good filter that mimics these characteristics correctly, if it's just basic 1px scanlines and nothing else I'm probably not gonna use it
CRT filters are just fake scanlines for nostalgia. Blurring the screen does not accurately recreate the way the games were meant to be viewed. This is because CRTs are analog and don't have discrete pixels at all, the color posphors can be partially lit, resulting in a better looking image. That just can't be recreated with a filter.
I wonder if you could create a shader that would do the job?
Yes.
https://forums.libretro.com/t/sony-megatron-colour-video-monitor/36109