This document discusses the process of developing interior design concepts from initial ideas to final designs. It explains how to explore user needs, generate 2D and 3D concepts, and refine ideas into a final design. Examples provided include a food court design that was conceptualized through rough sketches, refined 3D models, and implemented in 2000 with renovations in 2006 and 2009-10. The document emphasizes developing concepts from 2D to 3D, considering color, materials, and aesthetic forms to evoke feelings and meet user needs.