I've watched the official tutorial here:
http://www.youtube.com/watch?feature=player_embedded&v=DFmwLGhfWzY I am using two cameras in the scene one camera for the main content, the other that simply displays 3d GUI objects. Now I realize the tutorial states that I must set the second camera that points at the 3d GUI objects to work, and when i do that I'm able to touch the object with my android and it functions. The issue is that I cant set the tag for the second camera to Main Camera without messing up my scene. Is there a way I can set the GUI buttons so that they function without using a camera set to with the tag "main camera". I'd like to use a different tag. When i DONT set the camera that points at the GUI buttons to "main camera" it stops working... So what does the tag "main camera" actually do and how can i use some other tag instead?
You'll see an example of what I'm talking about 18-21 mins into the video. There must be a way to get this to work without setting my second camera tag to "main camera"