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this post was submitted on 09 Dec 2025
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I don't see a fundamental reason why this couldn't exist, because in principle it would be a pretty straightforward thing to implement. It sounds like what you're asking for is essentially a low-pass filter for the brightness of the entire screen (or, more specifically, a filter for each color channel so that blue can be filtered more than red or green)
I think the largest barrier to making something like that would be graphics APIs, as you'd need to read/buffer the entire screen and then apply the filter to every pixel. It would also probably make videos and motion look weird. But, I don't see why it couldn't be done.