Screenpacks (also called motifs) are custom configurations of the graphics and sounds used in the engine's interface (title screen, options screen, character select screen, etc.) for the M.U.G.E.N gaming engine.One default screenpack comes already bundled and installed with all versions of M.U.G.E.N, though there are plenty more available for download on many forums and creator's websites.
A motif typically has the following components:
- A title screen and associated option menus, also known as the frontend.
- A select screen and a custom select.def to go with it. Usually, these allow for a very large number of characters to be installed, sometimes in the thousands.
- A versus screen.
- An in-game fight screen, containing custom lifebars, combo counter and cut-ins for round starts, knockouts and other items.
The first two segments are located in system.def and associated files, while the last two are located in fight.def and associated files.
Thus, the frontend is able to operate independently of the versus screen, so mixing and matching different graphic sets for the menu and fight screens is possible.
As such, some packs only contain a set of fight screen graphics and sounds. These are referred to as "lifebars", due to that being the main thing that they change.