Header

The header of .mbd, .base, .aux, .snd, .data, .layer and .sbd files contains the following:

Structure

Field(s)	Description
u32 core_map_version	The map format version. The current version as of 1.55 is 903.
token game_id	Always euro2, in both ETS2 and ATS. The game will refuse to load the map if this is set to a different value.
u32 game_map_version	Always 3. Don't know what this does. The game will refuse to load the map if this is set to a higher value, but lower values are accepted.