FreeGameDev

Does anyone know where I can find a scripting reference for worldmaps? There is plenty of scripting documentation for levels on the wiki but I cannot find anything describing scripting for worldmaps. Am I missing something? Is there one? Is there anywhere that describes anything about worldmap scripting? How did the original worldmap makers know what scripts to use when making fading caves and stuff in their worldmaps?

For fading the same scripts should apply as in normal levels.