There are some details about this implementation: Three by three matrixes are used. Each matrix input is a two byte container, so the maximum value (in decimal) it can hold is 65,535.
Added Jun 01, 2021 at 10:33AM EDT by Phillip Hamilton. The format continued to spread over the course of May 2021 in new image macros. For example, on May 11th, Redditor u/HiMyNameIsLD posted an image ...