Objects keep falling through terrain

I’ve looked through a bunch of threads on how to solve this problem and came to a solution. The FPC stopped falling through the terrain (the terrain that I downloaded from the asset store) after I went to the hierarchy view and checked “Generate Colliders”. But now the buildings-- or objects-- that I’ve placed on my “self-made” terrain keep falling through the ground whenever I start the game. I’ve added colliders to my terrain. How do I prevent this??

If the terrain and the object both have mesh colliders then you must set the object colliders to convex enabled. This allows two mesh colliders to collide with each other.

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