Right So watching the Unity showreel i noticed the game Max & The Magic Marker
It inspired me to create a game along the same lines, I'm completely new to Unity
and I would love to know how on earth I go about transferring my artwork onto a layered background.
An alternative to single camera is to use two or more cameras. By default they will both render to the entire screen. You set the depth of the cameras to determine which one renders first, and you set the clear flags of the later camera(s) so that it keeps the image from the first camera as the background.
This approach has a disadvantage, that the two cameras won't automatically move in sync. You may have to write a script to move the background camera (slowly) as the foreground camera moves with the player.
But this approach may occasionally be useful. Examples:
With the single camera solution, if
the background plane needs to be very far away
you might have issues with clipping
planes and z-precision.
If parts of
the background sometimes move
independently of the foreground, for
instance if they are on a vehicle and
you want to show the background
scenery moving by.
If you want to
avoid interaction between the layers.
For example, if there were objects
that travel away from the camera and
you find them running into the background plane.
I just thought it would be useful to mention this option. But I would start with the single-camera approach (alpine's answer) and add more cameras only if you need to. I'm guessing you won't.