Generative try-on can cause face drift — the model may subtly change who the person looks like across runs. To anchor identity (as in Nano Banana Pro workflows), a character reference sheet helps: the same subject shown from front, profile, and back with neutral expression and consistent studio lighting.
Upload one photo of the subject. We call the image model to synthesize a single wide sheet with three panels. You can use that sheet together with your original photo in Try-on studio as extra reference images for more stable face and body across many outfits.