3D Projection is a technique used to display three-dimensional objects on a two-dimensional surface, such as a screen or paper. This method helps create the illusion of depth and space, allowing viewers to perceive height, width, and depth in a more realistic way. It is commonly used in various fields, including computer graphics, virtual reality, and architecture. There are different types of 3D projection methods, such as perspective projection and orthographic projection. Perspective projection mimics how the human eye sees the world, making objects appear smaller as they get further away. In contrast, orthographic projection maintains the object's dimensions regardless of distance, making it useful for technical drawings and blueprints.