paper envelope 3d model

Create a highly realistic 3D model of a paper envelope body only (main pocket, no top flap) designed for a Valentine’s Day theme. Use real-world scale: width 22 cm, height 11 cm, paper thickness 0.2 cm. Model thin folded paper geometry with realistic layer overlap on the sides and bottom, subtle curvature along folds, and clean quad-based topology. Optimize for real-time use (under 3k polygons). Apply a soft blush pink / warm white matte paper PBR material with visible paper fibers, subtle roughness variation, fine normal map, zero metallic, medium-high roughness. Photorealistic stationery look, elegant and romantic, not cartoonish. No flap, no text, no logos, no patterns. Export as GLB, real-world scale preserved.