People from Twitter (now known as "X") are accusing this artist of using AI in this drawing (see the replies here) because the artist made a series of tweets experimenting with AI (screenshots: asset #22297289 and asset #22297290). The artist has made a full statement on Tumblr (post 1 & post 2) and Twitter providing additional context and 10 full video recordings of them painting the artwork. People are still mad because the artist is allegedly still "pro AI".