全脸头盔3d模型

project: title: "Modern Full-Face Helmet – Hero 3/4 View" output_type: "single hero render" aspect_ratio: "1:1" background: "pure white" camera: angle: "front-left three-quarter view" elevation: "slightly above eye level" rotation: "approximately 30 degrees horizontal rotation" perspective: "natural product photography perspective" lens: "85mm equivalent" distortion: "none" helmet_design: category: "modern sport touring full-face helmet" symmetry: "bilateral symmetry" proportions: overall_form: "compact aerodynamic teardrop" chin_projection: "moderate forward extension" crown_profile: "low and streamlined" rear: "integrated subtle spoiler" shell: surface: "continuous smooth curvature" material: "composite fiber shell" finish: "deep matte black" reflection: "soft controlled highlights only" ventilation: crown_vent: shape: "centered horizontal intake" detail: "flush slider" chin_vent: shape: "wid