Orthographic projection is a type of two-dimensional (2D) computer graphics that allows for the accurate representation of 3D objects on a flat surface. This projection technique is often used in 2D video games, where it allows for a top-down, side-scrolling, or other type of view. The projection works by taking a cube or other 3D object, and mapping its 3D coordinates onto a 2D plane. This mapping is done in a way that preserves the relative positions and proportions of the 3D object’s components, creating an accurate 2D representation. Orthographic projection can be used to create detailed, realistic graphics that have a 3D feel.
See this video at it’s original source here.