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by TeMPOraL 1983 days ago
For reference, this is what happens to me. If I spend a few hours playing a particular videogame, its imagery "burns into" my mind - when I close my eyes, I can see recurring patterns from the game (like ground textures or UI elements); if I'm tired, that's an easy way to get me to high level 3 on the "starn scale". The effect disappears after I sleep for a few hours.