Best Answer
A Three.js product viewer workflow should start with the real asset, not a generic embed. Upload the GLB, GLTF, USDZ, OBJ, FBX, or ZIP package, preview scale and orientation, inspect materials and texture paths, check polygon and texture budgets, capture failed_upload_reason when parsing fails, then optimize or convert only after the target is clear: Three.js GLB, Unity GLB or FBX notes, Web product viewer GLB, USDZ AR handoff, or manual review.