Design: Map files
From Mod Wiki
Contents
Files used by editWorld
.autosave
An autosave file periodically generated by editWorld to safeguard from data loss.
.warnings
Contains any errors or warnings encounted by editWorld while editing the map.
.world
Contains the raw data describing brushes, patches and entities contained within the level. This is the main file that editWorld loads.
Files used by ETQW
.entities
Contains a compiled list of all entities within a level. This is the main file that ETQW loads.
.entitynames
A list of entities that have been renamed to avoid collisions.
.procb
Files used by both
.sft