To preform this glitch, one must be right next to a chunk boundary, then slowly turn the camera back, until a black space appears. The chunk behind will seemingly disappear, as the game does not see it to need to be rendered, this does slightly allow for minor X-Raying
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Thank you for your report!
However, this issue is a Duplicate of MC-63020.
It has been linked to this report. If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.