Level 0 is the first official level of the backrooms and by for the most popular. This is the first image posted from level 0:
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The appearance of this level is yellow all over, every rooms looks the same, The fluorescent lighting present in Level 0 hums at a constant frequency. Even if the rooms look identical at first sight there are difference in every room. It is possible to walk in a straight line and return to the starting place, and retracing your steps will result in a different set of room appearing that the ones already passed through. Hallucinations are common in level 0, the appearance of doors, the appearance of stairs, etc.. Interaction with level 0 are very rare.
