Only instantiate if clear space beside prefab

Questions & Answers
1

Hi, I have a Windmill model which I instantiate in my game. Now, I have mountains and stuff on my terrain, so I only want it to instantiate if there is no colliding things around it (terrain, other prefabs). How do I do that?

Thanks!

2

http://docs.unity3d.com/Documentation/ScriptReference/Physics.OverlapSphere.html

This will detect stuff with colliders in a given radius.