This week we implemented ray tracing to create a 3D scene with depth, lighting, and shading. Since we are building visual abstractions, it is always helpful to draw out what the scene should look like in order to determine the correct values to use. For example, when setting up the Cornell Box with five planes representing three walls, a floor, and a ceiling, it was helpful to diagram this with respect to an x, y, z axis to determine the normal vector (the direction each plane would be facing) and a valid point that falls within each plane: