Answer by supadupa64

Here's your options: 1) Occlusion Culling 2) Split map into different scenes, load them as you travel around 3) Mesh Baker (last resort probably or just to fine tune things) 4) If you want to put more time into your layout design, you can get this or something like this: https://www.assetstore.unity3d.com/en/#!/content/38168 5) Celebrate high FPS 6) The End