TX START

TX_START and TX_END are the delimiter marker lumps for stand-alone textures (by opposition to multipatch textures composed in TEXTURE1 and TEXTURE2). Originating from ZDoom in 2003, they have since been adopted by a few other ports.

Support
Ports implementing the TX_START/TX_END namespace include:
 * EDGE and 3DGE
 * The Eternity Engine
 * GZDoom
 * Skulltag
 * Vavoom
 * ZDoom