I'm a testsubject! :D
Reiko_Reyshidera (https://www.furaffinity.net/user/reikoreyshidera) tried Grayscaling for the first time, and it turned out wonderful! <3
Based on this picture, basically a complete re-do of it: https://www.weasyl.com/~shadowcloud/submissions/1717621/shadowcloud-by-wotansvogel
2015