Use case: product-mockup
Asset type: licensable transparent-background PNG stock asset
Primary request: a premium catalog packshot of one unbranded modern bicycle helmet with simple vents and straps tucked neatly inside, photographed as a clean source for background removal
Scene/backdrop: a perfectly plain, uniform light-gray seamless studio backdrop, no floor line, no horizon, no gradient, no texture, and no other objects
Subject: one unbranded modern bicycle helmet with simple vents and straps tucked neatly inside
Style/medium: photorealistic commercial product photography, natural proportions, high material fidelity
Composition/framing: side three-quarter view showing the complete aerodynamic shell; centered with generous isolation space
Lighting/mood: clean sports-product softbox lighting; even edge separation with no shadow on the backdrop
Color palette: matte white with charcoal details
Materials/textures: matte polymer shell, dark vent openings, subtle foam edge
Constraints: single isolated product cutout source, entire object visible with generous padding on every side, clean, crisp, fully closed silhouette suitable for automatic background removal, no cast shadow, no contact shadow, no reflection on the backdrop, no logos, no brand marks, no readable text, no watermark, no signature, no props, no hands, no people, no checkerboard, no transparency grid
Negative prompt: cropped object, cut-off edges, multiple copies, duplicate parts, floating fragments, distorted geometry, busy background, environmental scene, floor plane, hard shadow, soft shadow, glow, motion blur, depth-of-field blur, text, labels, logos, watermarks
