Are scanlines necessary?

How much do you think scanlines are necessary in old games? do you think that by removing them there could be problems with visuals or a crt effect as with sonkun’s shaders or with a real crt the good looking artifacts could disappear?

If you turn them off via a shader it won’t hurt anything at all. They are just a visual effect for the sake of nostalgia/making the game look like it is being played on an old TV. It’s totally up to you if you like them or not.

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Of course because they project low res on a higher res (double resolution y) . If you take them out you see full pixels and lower resolution. 480i/p games are already higher res and scanlines not needed.