What term describes photorealistic CAD-based interactive models that use surface and solid modelling?

• A. Virtual prototyping
• B. Virtual reality (VR)
• C. Working drawings
• D. Absorbed moisture

Answer: (A)

The term describes photorealistic CAD-based interactive models that combine surface and solid modelling to represent a product in a lifelike way. These models let designers visualize how a product looks and behaves, with realistic textures, lighting, and interactions, before any physical prototype is built. Surface modelling captures the exterior appearance and fine details, while solid modelling defines the internal geometry and function, allowing accurate simulations of fit, assembly, and performance. This approach is called virtual prototyping because it focuses on creating a convincing digital version of the product to test and refine ideas early in the design process. Virtual reality, by contrast, emphasizes immersive environments; working drawings are 2D representations; absorbed moisture is unrelated to the modeling concept.