I’m trying to simulate a window shade. It took me a short while to realize I may need to do this with a shader. I would like to slide one texture up and replace it with another. This would be my first time working with shaders. Can someone give me a starting point? Thanks.
You can probably pull this off by changing the tiling and the offset of the texture in the material (The options right next to the Texture field)
Try one of these shaders from the wiki as your starting point and work on it.
http://wiki.unity3d.com/index.php/Reveal_Non-Uniform_Texture