Optical illusion tile flooring.
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Previously:
https://www.homemadetools.net/forum/...319#post204271
https://www.homemadetools.net/forum/...512#post139328
https://www.homemadetools.net/forum/...063#post207344
https://www.homemadetools.net/forum/...011#post194980
https://www.homemadetools.net/forum/...603#post117904
