Specifies if an alternate image should be loaded for the object based on the map's theater. If this is set, the game will discard the SHP extension of the filename and use the same extension this theater's terrain tiles use. Correspondingly, the file it uses is not necessarily the standard tem file, such as the original tree##.tem. The characters used for each theater can be found on the Theaters page.
Objects with Theater=yes will furthermore not accept most art flags such as ActiveAnim or Palette.
Note
For the TerrainTypes object, even if Theater=yes is not specified, if you have an object file whose extension ends with a theater abbreviation, such as .tem .sno .urb etc., when you play in that theater, the object image will change to the current image in that theater file.
Bugs/Side-Effects/Unexpected Limitations
Although this flag is parsed on all object types, it only works properly on shape art.
Specifies which theater this map should use. Technically, this allows you to change the theater of the map at will, for example from a snow map to a temperate map, without otherwise editing the map or creating a whole new map.
However, most theaters have minimal interchangeability because their tilesets don't always have equivalents in all theaters. Therefore, changing the map theater may result in graphical errors.