Two cameras rendering to same viewport rect sometimes causes lower camera to render incorrectly

Really strange.

Making a ski jump game to be installed in a ski museum. I’m rendering the game 1080p double wide. The left screen is a touch screen and the right side a projector displaying the game. For the UI elements I’m using EZ GUI. This the Unity 4.5.2f1 Pro.

On the game screen I’m rendering the game experience and then on top of that I’m rendering a HUD, goggles with an indicator of the balance board the user is standing on. Image 1 is how it looks when it’s working properly.

(Images 2-5) On the touch screen if I have a skier model then the game camera renders incorrectly. The problem shows up either by rendering the menu screen upside down on the game screen or by rendering the menu screen blown out on the game screen.

If I turn off the HUD camera, which renders on top of the game camera, then having the skier on the touch screen doesn’t matter (image 6).

Any help to rid of this problem would be great.

Please submit a bug report.

http://unity3d.com/unity/qa/bug-reporting