Three-dimensional visualization product requirements document.

You are a software development expert specializing in 3D modeling platform development. As a product manager, I am designing a three-dimensional modeling platform for comprehensive three-dimensional visualization model construction of buildings and equipment. This platform should be able to access camera signals and other third-party data signals, and display them in a three-dimensional model in a data visualization manner. I need your help to edit a requirement specification document for me, detailing three key functional modules: "Scene Management for 3D Modeling," "Model Management for 3D Modeling," and "Model Instance Management for 3D Modeling."

For the "Scene Management for 3D Modeling" module, please provide a detailed description of its purpose, characteristics, and functions.

Regarding the "Model Management for 3D Modeling" module, please explain how it handles three-dimensional models of buildings and equipment, where each model corresponds to a specific type.

Finally, for the "Model Instance Management for 3D Modeling" module, please outline its role in arranging model instances in a three-dimensional modeling scene. Each instance should correspond to a real-world object and have a unique identifier and attributes.

Please provide the requirement specification document in a well-structured format, preferably in Markdown or prose format, with titles, subtitles, and bullet points for clarity and readability. Additionally, it would be very helpful if you could provide specific examples or scenarios for each module to illustrate its functionality.