  Construction Flow for            D2      MER base patch addon
  addon and standalone            ETERN    to extend to base
  style wads.                   +--------+ texture set  +--------+
                                |texture |              | addon  | (playable
  BRK start                     |  base  |------------->|  wad   |  if no
  to create initial             +--------+        /     |        |  sprites
  resource tree from                             /      +--------+ or flats)
  start.wad                                     /
                                +--------+     /        +--------+
            MAK from resources  | patch  |    /         |  play  |
  YOURWAD.RES------------------>|  wad   |------------->|  wad   |
  TEXTURE1.TXT---/ / / / / / /  |        |         /    |        |
  *.BMP-----------/ / / / / /   +--------+        /     +--------+
  *.LMP------------/ / / / /                     /
  *.WAV-------------/ / / /                     / MER /X patch resrc play
  *.TXT--------------/ / /      +--------+     /  to extend to resrc
  *.WAD---------------/ /       | resrc  |    /   textures/sprites/flats
  *.MUS----------------/        |  wad   |----
                                +--------+     DOOM2 -file resrc.wad addon.wad
 PATCHER v1.2, by Jim Flynn       DOOM2        DOOM2 -file play.wad
  Copyright 1996, Freeware       ETERNRES
