Game map - tarrain + buildings

[Tau]

Hi all
Map for my game consist of one heightmap and buildings that are placed on it. What is better for performance?
To create each building and map with separated rigid bodies and compound shapes, or to create entire map as one rigid body and one compound shape that will contain shapes of heightmap and all buildings.

[Tau]

Or similar question:
When creating a map is it better to create entire map as one body with btCompoundShape OR to create different static objects with their own bodies and shapes?

[xexuxjy]

I think the most truthful (and unhelpful answer) is that it depends on your world and what you might want to do with your objects. I'd generally say that breaking it up would be more useful though, if you have a heightfield or triangle mesh for your ground/terrain you can give it one particular type of collision mask, and possibly a different one for buildings and the like - another advantage is that you could add/remove building collision objects, or vary their complexity depending on where the player is on the map. Hard to know from a performance point of view without knowing some idea of scale of map, number/complexity of objects etc.

[Tau]

Ok thanks, i will try both and see what happens.