Methodology for Evaluating Buildings Using Digital Architecture: Daylighting Optimisation in a Lecture Hall through Prism Refraction and Integrated VR Simulation

This Research Paper illustrates a digital architecture methodology for evaluating and improving daylight performance in educational buildings, with attention on a university lecture hall in Egypt. The project explores a novel lighting system using glass prism refraction and convex lenses integrated into circular windows to collect and redirect sunlight into interior spaces. Optical fibres and a sealed circuit strategy are employed to control light flow and minimise distortion, maximising visual comfort and energy efficiency. A range of digital tools—including Rhinoceros with Grasshopper, Archicad, ClimateStudio, and Twinmotion—were applied across simulation, modelling, and immersive visualisation phases. Advanced rendering and gaming engine features were utilised to convert the architectural model into an interactive VR experience using BIMMotion, allowing for complete environmental management and participant collaboration. However, constraints in current simulation software were noted, especially in precisely tracing prism-based refraction, requiring mathematical estimations and visual-based validation. Despite these challenges, simulation outputs, user feedback, and test results showed it was achievable with this refractive daylight system. This research contributes to sustainable building evaluation by merging passive lighting innovation, digital modelling, and immersive visualisation into a coherent performance-led design workflow.