Game Development Reference
In-Depth Information
7. You should have something like the following. Save this as a PNG file named
Backdrop_Skyline .
What just happened?
You created an Alpha channel which defines which pixels are see-through, and which are
visible. You then made the sky area see-through so that you will be able to see the sky through
it in Unity. You made the image seamless so that it can wrap around a cylinder or square.
Time for action - creating a backdrop
1.
Back in SketchUp, create a large square centered in the terrain but much bigger than
the terrain.
2.
Push / Pull it upwards as you can see next. Delete the top face. Push / Pull the botom
face so that it sits below the terrain.
 
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