Create an ultra-realistic modern studio photo collage in 8K quality with a vertical 4:5 aspect ratio. The image feels like a real, simple studio photoshoot combined into one collage, not stylized or dramatic. The collage contains one main frame and two smaller frames showing slightly different natural moments. In the main frame, the subject is seated normally on a square studio cube, sitting comfortably like a regular person. The back is straight but relaxed, both feet flat on the floor, hands resting naturally on the thighs. The body language is calm and casual, with no forced pose. The head is straight, and the eyes are looking slightly to one side, not directly at the camera. The facial expression is neutral and relaxed, with a natural everyday look—no intensity, no model-like attitude. In the first secondary frame, the subject remains seated in the same position but slightly turned to the side, one hand still on the thigh, the other relaxed near the knee. The gaze is directed off-camera, as if casually looking around the studio. The expression remains normal and comfortable. In the second secondary frame, the subject is shown in a closer seated crop, posture unchanged, shoulders relaxed, head slightly angled, eyes looking away or slightly downward. The expression is simple, calm, and natural, like a candid photo taken between shots. Across all frames, the outfit stays the same: a white oversized long-sleeve shirt, light gray loose trousers, and clean white sneakers, with realistic fabric folds and natural drape caused by sitting normally. The background is a solid light pastel blue studio wall, evenly lit and minimal. Add subtle realistic 3D Instagram elements into the studio space: one floating Instagram logo and one small notification icon, placed naturally like physical studio props, with correct shadows and depth but not drawing too much attention. Lighting is soft and even studio lighting with natural skin tones and gentle shadows. The image should look like a real everyday studio photo collage captured on a professional full-frame camera with a 35mm lens at f/2.5, ultra-realistic, clean, simple, and natural.