### Subsection AR Technology
These studies and improvements have significantly improved the stability and applicability of AR technology in complex environments, laying a foundation for its wide application in more scenarios. In terms of virtualization display, the integration of AR and VR has gradually become one of the development trends of technology. [PERSON] et al. [9] proposed a multi-dimensional virtual scene display scheme based on X3D technology, which provided the possibility of a multi-dimensional space display for AR. However, the real-time response ability of this technology in dynamic scenarios still needs to be optimized, and it is easily limited by hardware conditions in complex environments. [PERSON] et al. [10] simulated a next-generation AR user interface through immersive VR, demonstrating the potential of combining virtual reality (VR) with augmented reality (AR) and bringing new ideas for future user interface design. Although the solution has advantages in visual effects and interactive experience, its implementation relying on specific hardware makes it difficult to meet the portability needs of mobile AR applications, and it still needs to be further improved to adapt to the development of portable devices. The application of AR technology in RV interior design has more specific adaptive advantages than other industries. Similar to AR technology being widely used in the home improvement industry, AR can be used to preview design elements such as furniture layout and colour matching [11]. However, the interior space structure of the RV is more fixed than that of the home improvement design, and the layout is limited, so the modular and highly customized design achieved through AR has more application advantages. For example, [PERSON] et al. [12] studied the feasibility of applying AR display technology in static scenes in small spaces. Although the technology has a good performance in static display, it still has limitations in the flexibility of multi-module design. In this regard, [PERSON] and [PERSON] [13] proposed an AR optimization scheme for the modular design of RV interiors, which enhanced users' real-time interactive experience in RV interior display and design by improving response speed and interactive fluency. Especially in restricted spaces such as motorhomes, the optimization of modular design can effectively support users in adjusting details and design previews, reduce design errors, and provide more efficient and convenient technical support for the internal layout of motorhomes. In the automotive display industry, AR is often used to display the exterior and interior of vehicles, allowing users to view different models and interior options. However, RV interior design involves more functional areas (such as rest areas, kitchen and bathroom facilities, etc. ), requiring more complex AR modular design and dynamic interaction capabilities. The unique challenge in this area is to achieve efficient, multifunctional layouts in limited spaces, which is supported by AR's flexibility and real-time feedback capabilities. For example, in the RV model, multiple internal 3D models can be preset as AR display modules. The interior design of the RV is previewed by scanning the layout of the mobile phone, and then the virtual interior module of the RV is superimposed on it. The main advantage of this technology is its ability to provide highly accurate plane recognition and a real-time interactive experience so that customers can seamlessly integrate and interact with virtual content in the real-world environment. For example, while previewing the interior scene of the RV, it can also make changes to the interior design, including material selection and colour matching, to ensure that the final product meets the personalized aesthetic of the customer, and has great application prospects for a small-space display or design similar to the RV. Because countries like China have strict regulations on the layout of the interior of the RV, there are often several fixed layouts inside a car.