It maps Class IDs defined in external_variables.txt to specific Lingo scripts inside the .cct file.
hh_furni_classes.cct acts as the that connects the graphical furniture assets ( hh_furni_*.cct files) to their functional behaviors within the game engine. hh_furni_classes.cct
If a chair doesn't seat, or a table is walkable, hh_furni_classes.cct is likely missing or misconfigured for that item's class. It maps Class IDs defined in external_variables
external_variables.txt (defines which class a furni belongs to) hh_furni_items.cct (contains the actual graphics/assets) or a table is walkable