The COMPLVL lump allows for the loading of an exact complevel, without the need for specifying via the parameter -complevel.
The order of precedence is highest to lowest: parameter > lump > config. This means that if a complevel is set through a parameter, this will take precedence over the contents of COMPLVL, while COMPLVL will in turn take precedence over whatever is set in the menu as the default compatibility.
The COMPLVL lump only has a single value:
value
vanilla- Selects complevel 2, 3 and 4, depending on the IWAD loaded, for vanilla compatibility
- Can be used in conjunction with the GAMEVERS lump to specify an exact vanilla complevel (0-4) and limit-removing
boom- Selects complevel 9, for boom compatibility
mbf- Selects complevel 11, for mbf compatibility
mbf21- Selects complevel 21 for MBF21 specifications