NoteSkins

NoteSkins are various appearance options that are used for the notes/arrows in each game type. For a game mode to be playable, there has to be at least a noteskin folder named "default" in the folder for that game type.

NoteSkins can either be color-changing (vivid), or colored based on the rhythm or beat the arrow is on (note colored).

StepMania 3.9 came with four noteskins: Default, Flat, Note, and Solo. (the latter two were removed in SM 3.9a after the notes' appearance were changed to avoid copyright issues)