There are tile IDs in layouts which need to change - some are using a generic tile and need to use a specific tile. This will break savegames possibly.planetmaker wrote:Hm, IIRC only changing the tileIDs (or industryIDs and industry tile layout) breaks savegames
The slicing of the graphics needs to change in multiple cases, with also then a change in varaction 2 to decide real sprites for tile.
That doesn't technically break savegames, but it means existing industries in a savegame will have garbled graphics, which to many players is same as 'broken', i.e. either not-meaningful bug reports, or they just get annoyed with FIRS and think it's low quality.
