###### Abstract  
This research paper explores the impact of immersive virtual reality (IVR) on the teaching of conceptual design in engineering and architecture fields, focusing on the use of interactive 3D drawing tools in virtual and augmented reality environments. The study analyzes how IVR influences spatial understanding, idea communication, and immersive 3D sketching for industrial and architectural design. Additionally, it examines user perceptions of virtual spaces prior to physical construction and evaluates the effectiveness of these technologies through surveys administered to mechanical engineering students utilizing VR/AR headsets. A structured methodology was developed for students enrolled in an industrial design course, comprising four phases: initial theoretical instruction on ephemeral architecture, immersive 3D sketching sessions using Meta Quest 2 and Microsoft HoloLens 2 VR/AR headsets, detailed CAD modeling based on conceptual sketches, and immersive virtual to evaluate user perception and design efficacy. Ad hoc questionnaires specifically designed for this research were employed. The results indicate a positive reception to IVR, emphasizing its ease of use, intuitive learning process, and effectiveness in improving motivation, academic performance, and student engagement during the conceptual design phase in graphic engineering education. c 202 have also proven highly beneficial in the field of architecture, engineering, and construction (AEC) [2]. The incorporation of VR and AR in this domain has demonstrated itself to be a powerful tool in professional practice, offering immersive and interactive capabilities that have the potential to transform the way architects design and plan urban spaces [3; 4]. It is now common to see these tools integrated into project design software, providing realistic visualizations of building designs and VR-based tracking tools on construction sites [5; 6]. In particular, by combining CAD tools with VR--as already available in certain software--designers can visualize and manipulate their design models within an immersive 3D environment. This not only enhances design precision and project comprehension but also facilitates collaboration and decision-making, thereby improving both the efficiency and quality of projects [7; 8]. Virtual reality is revolutionizing the world of architecture and urban planning by enabling designers to create immersive and realistic environments that shape the future of design [9; 10]. Although not yet a widespread practice, some architectural firms are already demonstrating to their clients what it would be like to inhabit the different spaces of an architectural project. This approach allows clients to experience the spatial relationships between walls, ceilings, and floors from their natural eye level [11]. Similarly, it is possible to simulate various lighting models at different times of the day or year, based on the actual geographic orientation of the space [12]. With VR applications, professionals can immerse themselves in their designs before they are constructed, offering a more realistic and detailed perspective of the final project [13]. This capability not only improves design precision and quality but also transforms the way professionals collaborate, allowing for real-time interaction with designs in a shared virtual space [14]. Such interaction facilitates error detection, enhances communication, and promotes collaboration among the various disciplines and stakeholders involved in a project. In the educational field, VR and AR also open new avenues for fostering innovative learning methodologies and establishing new work processes [15]. Architectural and urban design education greatly benefits from these technologies, as they allow students and professionals to experience and design in an immersive, life-scale environment. This not only enhances their technical skills and understanding but also enables them to explore and express their ideas in a more intuitive and emotionally resonant manner [16].