It’s not uncommon for magicians to pursue other creative ventures, like painting, shadowgraphy (Dai Vernon‘s main source of income) or edible magic art (Annabel de Vetten). Please have a look in my “Magic Art” section for numerous other bits and links.
As I just noticed on The Davenport Collection website (a fine and growing resource for magic history buffs!), magician and mentalist Peter Warlock was also an anbitious amateur painter. Several examples from the Davenport collection are on display there, including some where he tried his hand on trompe de l’oeil art (which links him with Georges Méliès, see an upcoming post).
Above you see his rendition of Buatier de Kolta performing his unique “Expanding Die” illusion.