Make a box that occludes?

Scripting
1

Example: http://brlcad.org/gallery/d/104-4/earth.png

I basically want to make a cutaway model that can be turned on and off. But I dont have to have to build it into the model because I want the user to be able to modify the cutaway.

So I want to make a box that occludes everything inside of it. Or have the ability to set what is occluded by the box. Like maybe by material tag? So anything with the tag “cutaway” would get occluded?

Anyways, how could this be done?

I had a look at this thread http://forum.unity3d.com/viewtopic.php?t=37980&postdays=0&postorder=asc&start=15 but it pokes a hole through the whole thing where you see the background which I dont want.

More Examples:
http://www.turbosquid.com/3d-models/maya-eye-section/300445

http://www.turbosquid.com/3d-models/3d-model-valve-safety-modeled/238039

http://www.turbosquid.com/3d-models/3d-model-valve-safety-modeled/238039

2

Did you see what jessy posted in that thread? It sounds like it wouldn’t cut through everything with his shader.

Also maybe you could use a second camera, rendering a different layer for the “inside” models so when you cut the “hull”, the other cam would show its view in that hole? Dunno if that would work.

3

have a look at this it may help
http://forum.unity3d.com/viewtopic.php?t=55686