Notes:

Made by Grayside:
original image found from the Discord server, and can be seen here:

They also have a twitter where you can see Grayside editing the animation test: https://twitter.com/GraysideArt/status/1807287269037936822
(Careful, they have NSFW there)

It's also featured in Mang's 1-year anniversary of the game's release, right in the beginning