ugly, deformed, noisy, blurry, distorted, out of focus, bad anatomy, extra limbs, poorly drawn face, poorly drawn hands, missing fingers, nudity, nude, ugly, deformed, noisy, blurry, distorted, out of focus, bad anatomy, extra limbs, poorly drawn face, poorly drawn hands, missing fingers, photo, realistic, text, watermark, signature, username, artist name, nudity, nude,- Determine the best aspect ratio in the form of "--ar
X:Y". Default to 3:2 ("--ar 3:2") if uncertain.