## 2 Related Works
### Commercial Solutions  
We conducted a Google search with Gemini artificial intelligence (AI) [14] to identify the most significant commercial products. The query was \"a list of software responding to the keywords Configuration, VR, Product Review, and Multi-user\". The results were then reviewed and filtered to narrow the search to the most relevant solutions. Five software programs were found: Autodesk VRED [15], EyeCad VR [16], Keyshot Studio VR [17], Mindesk [18], and VR Sketch [19]. A technical analysis was conducted to assess the operational focus of these applications, evaluating the following parameters:  
* **Accessibility**: Navigation method, quick-access PoV and UI user-friendliness
* **Configuration**: Management of aesthetic and geometric variants. * **Object Manipulation**: Real-time tools for geometry modification and customization. * **Interaction and Inspection**: Integrated tools for purposes such as measurements, clipping planes, annotation, and screenshots. * **Immersiveness**: Visualization method, animations, and dynamic environmental features. * **Multi-User Capability**: Technical requirements for collaborative configuration and communication. * **Synchronization**: VR-CAD bidirectionality. The following is a summary of the commercial analysis:  
**VRED Pro** (Autodesk) [15]: A prototyping tool for realistic, collaborative scenes with advanced variant management and inspection tools (e.g., clipping planes, measurements). While effective, it lacks intuitive workflows for configuration and VR object manipulation, and it requires costly licenses and high-performance hardware for optimal multi-user sessions. **Mindesk**[18]: A VR plug-in for CAD software enabling real-time object editing with bidirectional synchronization. Intuitive for navigation but lacking collision detection and configuration tools, it prioritizes technical precision over immersive rendering and offers limited support for product customization. **EyeCad VR**[16]: A standalone software for immersive design approvals, providing customization features, intuitive navigation, and realistic rendering with a wide material library; while strong in interactivity, it lacks collaborative features and inspection tools. **Keyshot Studio VR**[17]: A Keyshot extension for VR visualization, offering advanced configuration tools, precise geometry manipulation, and photorealistic rendering. High-end hardware and expensive licenses limit its accessibility for collaborative sessions. **VR Sketch**[19]: Integrated with SketchUp, it enables synchronized CAD modeling of complex geometries along with dynamic tools such as section planes, measurement, and precise scaling. Although not optimized for photorealistic rendering, it supports mid-tier hardware and extends CAD tools effectively into VR. A comparative table of commercial software aligned with the scouting parameters mentioned above is presented here (Table 1). The tools described above showcase diverse approaches to VR-based design and customization, but they also reveal shared challenges. VRED and Keyshot Studio VR prioritize rendering quality and advanced configuration tools, yet their inability to optimize graphical resources limits their accessibility on mid-tier hardware. Additionally, their complex workflows and steep learning curves complicate virtual scene development, leading to dependence on proprietary authoring processes. Multi-user collaboration further amplifies these challenges, as all participants must own the same license package as the host to access full scene functionalities, increasing costs and reducing accessibility. In contrast, Mindesk and VR Sketch focus on integrating VR into CAD workflows, enabling real-time co-design with synchronized files. However, their lack of dedicated tools for product customization and limited rendering quality make them less effective for detailed product evaluation. Moreover, VR Sketch collaboration is restricted to scene exploration, as editing functions are disabled.