Sources:
“Umegrafix” website | “Umegrafix” twitter feed | Pixiv page | Deviant art page | “Yamato art in 60 minutes” Twitter page
At right: cover for Umeno’s first doujinshi, April 2015
Interior pages from doujinshi
Poster sold in theaters with Ark of the Stars, December 2014
Cover art for Yamato 2199 Machine Picture Book doujinshi by “Kiyo Club”, December 2014