FPS and object hiding, occlusion culling

Unity Engine
1

I urgently need to boost up my FPS considerably on my island.
For that reason I want to exclude villages from my process when they are behind a mountain.
My game has only one camera (located on the first person)

This is what I tried:
Experiment 1:
I applied occlusion culling, all objects and terrains clicked as ‘static’, the occlusion checkbox in my camera activated.
No result. The village behind my mountain still slows down my FPS

Experiment 2:
During play, I delete the village behind the mountain. Now it is OK. FPS now increases a lot: 4 times higher !

Can anyone advise me how to exclude objects behind a mountain, so that it does not slow down the game ?

2

Did you bake after setting them to static?
http://docs.unity3d.com/Manual/OcclusionCulling.html

3

yes I did. In the library it shows the occlusion files.

4

I have solved the problem my own way in the meanwhile. I have divided my island into 10 zones. By means of a script, I sink down all zones where my 1st person is not present by 10000 m so that these zones are absolutely outside the reach of the camera. This way I have more than doubled my FPS without any negative consequences on memory.

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