Object-Oriented Graphics Rendering Engine (OGRE) is a scene-oriented, real-time, 3D rendering engine, as opposed to a game engine. It is written in C++ and is designed to make it easier to write programs that use hardware-accelerated 3D graphics. The class library abstracts from the underlying system libraries (Direct3D and OpenGL).

An ogre (feminine ogress) is a being usually depicted as a large, hideous, manlike monster that eats human beings. Ogres frequently feature in mythology, folklore, and fiction throughout the world. They appear in many classic works of literature, and are most often described in fairy tales and folklore as eating babies.