I was wondering "What If"
Well as far as I can see there is no indication that this would work, as a matter of fact judging by what is stated in the general discussions about making MOCKUPS with Mystic, I kind of got the impression that wouldn't even come close to working, but I was curious enough to try. I set the generator to Rectangle, and imported one of my designs that I had downloaded to my computer. Once I imported / uploaded the design the Magic Wand turned back on and could not be turned off with the design uploaded. I used the following slightly modified prompt from one of the tutorials.... (prompt) Top-down flat lay of a white t-shirt with the included image printed on the shirt on a wooden surface, folded jeans on the side, Neutral background with even lighting. (end prompt) My results came back in a few minutes looking like this. Maybe I just got lucky this time???