1. Executive Summary Materials in SketchUp are digital assets that define the visual appearance of surfaces (faces) in a 3D model. They simulate real-world textures (e.g., wood, brick, metal, glass, fabric) and colors, enabling designers, architects, and visualizers to communicate materiality, context, and design intent effectively. Proper material management is essential for realistic rendering, accurate documentation, and efficient model performance. 2. Definition & Core Components A SketchUp material consists of three primary visual channels: