As in the picture above, sometimes we want to render multiple versions of the same object with different transformations in an efficient way. The way we do this is called instancing (as the title of the slide suggests!), which is a technique that allows us to render multiple objects with a single render call, saving the expensive CPU-GPU calls that would need to take place each time we render a new object. You can read more about the wonder of instancing in OpenGL at this link: https://learnopengl.com/Advanced-OpenGL/Instancing