title: How to flip the normals of the collider mesh in Unity
body: <p>I have a sphere in Unity and have used a script to flip the normals so I can see a 360 texture on the inside. I'm doing this because eventually I want to play a video on the inside, and also have other spheres inside hat can be thrown around and bounce off the inside walls of the outer sphere. The problem is, despite the normals of the sphere facing inwards, the collision is still standard. Objects within the sphere just fall straight through.</p>
  
  <p>Do I need to add to my script to include the collision mesh?</p>