Create a 3D rendering of a female figure with a serene and pleasant facial expression. She should have wavy hair cascading down her shoulders and intricate details like the subtle textures of her hair strands and the softness of her skin should be evident. Her eyes should be large and expressive, conveying a gentle and inviting look, with a slight smile on her lips that suggests kindness. The image should be monochromatic, with various shades of grey to highlight the depth and contours of her face. No specific individual or identity should be recognizable in this representation, and it should be presented in a realistic style. The background should be plain to keep the focus on the model