This is the premise of a 90's sci-fi novel about VR (https://en.wikipedia.org/wiki/Labyrinth_of_Reflections https://en.wikipedia.org/wiki/Labyrinth_of_Reflectio

This is the premise of a 90's sci-fi novel about VR (https://en.wikipedia.org/wiki/Labyrinth_of_Reflections https://en.wikipedia.org/wiki/Labyrinth_of_Reflections). In the novel, a character discovers a graphical sequence that puts people into a hypnotic state in which they can be shown a low-res virtual environment which their brain then fleshes out.