The art usually changes when the text description in the mirror changes. There are new images for each tier of muscle, with variants depending on what serums have been used. Height doesn't change anything, booty serum doesn't change anything, and waist/ hip serums only create a variant after using 2 or 4 serums, after which more serums will only update the text. Breast serums have far more variants and unique expansion images depending on how much muscle you have. Some combinations, (like 4 hip 2 waist 2 muscle or something, I don't remember), actually have broken or missing images.