Skin

Skins are extra player characters for modern source ports of games based on the Doom engine. These lumps contain additional graphic sprites, sounds, and other information which change the appearance of the main character and the user interface without otherwise altering gameplay. Skins first appeared in Doom Legacy then were later adapted into a number of other source ports, including ZDoom. Currently, most Doom Legacy based ports and ZDoom based ports completely support skins.