Is it considered sacrilegious to paint a picture of the chuppah in one's future wedding before the actual ceremony? Therefore, can the artist portray his/her upcoming wedding scene without the chuppah?
It's not considered a sacrilege to paint a picture of the chupa in one's future wedding. Nor to paint the wedding scene without the chupa. Source: I've been around a little and have never heard of such a thing; and Nit'e Gavriel and Taame Haminhagim don't mention it AFAICT.