I have created cartoon matte images for a background. I am trying to add them to a skybox and then into unity. How do I go about doing that? Right now I have one of the default skyboxes in unity that I think came with the island demo.
First, you will have to create your matte painting as a cube: six images (the six sides of the sky*box*) continuously representing the six sides of the matte painting (including top and bottom). Here's an example from boxxblog:
However, in Unity, you still need to slice those in six images (up, left, forward, right, back and down), and apply them according to this section of Unity reference documentation:
http://unity3d.com/support/documentation/Manual/HOWTO-UseSkybox.html
To summarize it, (1) copy your image files to your Assets folder, (2) create a new Material using the RenderFX->Skybox, (3) assign your images to that new material, (4) go to Edit > Render Settings menu, (5) assign your skybox material to the Skybox Material slot (as in the image below, from the Unity Reference guide):
