Render only what the camera see's

Questions & Answers
1

I am thinking of this so that i am not loosing performance on anything i am not looking at and was wandering if some one could please point me in the right direction(I don’t have pro)

Thanks Guys

2

Unity already does frustum culling so i don't quite get what you want to improve?

OnBecameVisible is called when an object is "seen" by any camera (that includes the sceneview camera in the editor).

OnBecameInvisible is called after an object has left the frustum of all cameras.

I suggest you look through the different events that Unity provides to get a better view of it's capabilities:

http://unity3d.com/support/documentation/ScriptReference/MonoBehaviour.html