Set Depth Camera to show DigitDisplay

The Depth Camera can be used to show the bottom panel when the MainCamera is following the character.

At first, the scene consists of a background and a bottom panel which shows the digits.

Step 1: Choose "bottom" object, add a Layer named "Bottom", and modify the Layer as "Bottom".

Step 2: Create a Camera and Set as the image shows:
Change "Clear Flags" to "Depth only" and "Culling Mask" to "Bottom"

Step 3: Modify the MainCamera:
Change the "Culling Mask" value without Bottom and assign "Depth" value as "-1".

Step 4: Remove "Audio Listener" of "Camera" object:

Step 5: Write a script to "Camera" in order to show the game digit.