Convert a single source image into a textured 3D model (image-to-3D). Synchronous: the call blocks while the mesh is generated, decompressed, and re-uploaded, then returns a downloadable GLB model_url plus an array of snapshot image URLs rendered from different angles (handy for previews). Accepts optional mesh controls: target_num_faces (max triangle count, 1000-200000, default 50000), texture_size (1024 or 2048, default 2048), and texture_type ("pbr", "simple", or "none", default "pbr"). Credits are charged only on success. Pass an optional request_id to tag the result so you can locate it later via get3DModelResults. Requires an API key (user scope).