3D Facade Projection Mapping: Facade projection mapping involves projecting visual content (e.g., animations, textures, videos) onto the external surface (facade) of a building or hall. By mapping the visuals accurately to the structure's geometry, it creates the illusion that the building itself is alive, moving, or changing. In the case of a hall or a curved surface, the projection needs to account for the contours, angles, and irregularities of the structure to ensure the visuals align properly.