Hands are notoriously difficult for AI image models due to their complex geometry and variability. To improve hand rendering: avoid putting hands in the foreground or center of the image when not necessary, add 'detailed hands, anatomically correct fingers, natural hand pose' to your prompt, or specifically describe the hand position ('open palm facing camera,' 'holding a pen naturally'). Using Nano Banana Pro increases anatomical accuracy. If hands are not the focus, position them in a natural resting pose or partially obscured.