Simple mobile / iOS terrain blending

I’m looking for a solution for differentiating a large tiled texture area (e.g. grass, or pavement) with a second or third texture variation so it doesn’t all look the same, but I don’t know how to approach this. I found this shader which looked perfect for what I needed…

I took the picture from the LayerShader on the Unify Wiki but it no longer works on Unity 3.x and has no lightmapping support. I’m struggling to find a similar approach that is still supported. Everything I’ve read about Unity’s terrain editor is to generally avoid it for mobile games but I don’t know what else people are using.

Sorry, I’m a bit of a noob about it — I’ve searched for hours but can’t seem to find out anything. How are mobile developers usually approaching this in their games?

There’s a really awesome plugin on the Asset Store - Terrain 4 Mobile: http://forum.unity3d.com/threads/123282-T4M-Black-Edition
Highly recommended.