"Create a 3D rig of an elderly person without a shirt and wearing shorts. The character should have realistic, aged features such as wrinkles, gray hair, and a stooped posture. Ensure the rig includes fully articulated limbs, a flexible spine, and detailed facial expressions that can convey a range of emotions such as wisdom, kindness, and weariness. The character should have realistic skin textures and details associated with an elderly person. t pose pls