Alternativa3D 8 Modified Version "3D Layer" Example.
https://github.com/matsuse/Alternativa3D
Four scenes are compounded like one screen and expressed as this sample.
- Background
- Ball
- Box
- HUD
Each scene is compounded like the layer of PhotoShop.
The function is the same as that of "Depth Only" of the camera of Unity.
http://docs.unity3d.com/Documentation/Components/class-Camera.html