"Avoid any visible blemishes or imperfections on the skin."
"Do not include irregularities or asymmetry in facial features."
"Prevent any blurriness or lack of sharpness in facial details."
"Avoid the presence of shadows that may obscure facial features."
"Exclude any signs of aging, such as wrinkles or fine lines."
"Do not permit the presence of stray hairs or disheveled hair."
"Avoid any unevenness in skin tone or complexion."
"Prevent reflections that may distract from facial clarity."