`gui` draws in window space, where the bottom left corner is `[0,0]`. `hud` draws in screen space. In either of these, you can call "render" functions directly.
`draw` draws in world space, and mum functions can equally be used there.
## MUM
The GUI system which ships with Prosperon is called *MUM*. MUM is a declarative, immediate mode HUD system. While Imgui is designed to make it easy to make editor-like controls, mum is designed to be easy to make video game huds.
