3D Model: A Realistic Anatomically Accurate 3D Male Human Model, Neutral Standing Pose, Arms Relaxed, Legs Slightly Apart. Muscular Athletic Build With Detailed Visible Surface Muscle Anatomy, Correct Proportions (7.5 Heads Tall). Highlight The Pectoralis Major Muscles In Bright Red With Visible Muscle Fiber Texture, Rest Of Body In Grayscale Anatomical Sketch Style Showing Striations And Tendons. No Skin, Only Muscles And Tendons. Neutral Facial Expression, Short Hair. High-resolution, Rigged Model, Plain Black Background. Output Format: FBX Or OBJ.