A photorealistic full-body portrait of a slender young adult woman with fair skin and long straight strawberry-blonde/red hair cascading over her shoulders, sitting completely nude on a thick weathered fallen tree log in a vibrant autumn forest. She sits with her legs elegantly crossed at the knee, one foot dangling, the other resting on the log. Her body is slim with small natural breasts, a flat stomach and visible hips. One hand rests lightly on her thigh, the other supports her on the log behind her. She looks directly at the camera with a soft, slightly parted-lip expression. The surroundings are a colorful autumn woodland with tall trees showing brilliant red, orange, golden-yellow and deep brown leaves, many already fallen and covering the ground in a rich carpet of autumn foliage. Soft golden sunlight filters through the canopy, creating warm dappled light that complements her reddish hair. Natural skin texture, realistic details, sharp focus, high resolution, no clothing of any kind, no text, no watermarks, no UI elements.