Camera loading all polys in the scene?

I am using the T$M (Terrain for Mobile) asset for my scene. For some reason, my camera is loading all the polys within that scene. The camera can only see as far as 150, and has fog applied. It is loading around 32k polys (ALL the polys of my terrain and characters), even if they are completely out of view for my camera. Is this something to do with the asset I'm using? Or a setting I must change? It was not like this earlier in my development. Has only changed just recently. Thanks in advance.