Problem with terrain transparency

Hi! I have a problem when trying to make a terrain invisible. I have read the article at http://wiki.unity3d.com/index.php/TerrainTransparency
and have created a shader and changed the code to the one supplied in the article. I have then created an image in Gimp with one layer with an added alpha channel then erased everything in the image so that the image is transparent. I then import this image in to Unity.

From here I’m not sure what to do. I have found two previous questions about this in unity answers and these tell me to create a material of this texture but the problem is that the terrain texture paint function need just that, a texture and not a material. If I use my transparent texture to paint with my terrain turns a light blue.

What am I doing wrong? The game is supposed to be for an android device, does this matter?

it’s very easy, create a material and apply the shader. next go to: “terrain/terrain settings/material” and apply there the material.

thats all (and making the transparent texture).