Material.lerp color transition

Unity Engine
1

I’m using material.lerp to change smoothly change a gameobject color from material1 to material2.

The code from the reference document is:

// Blends between two materials
var material1 : Material;
var material2 : Material;
var duration = 2.0;

function Start () {
// At start, use the first material
renderer.material = material1;
}

function Update () {
// ping-pong between the materials over the duration
var lerp = Mathf.PingPong (Time.time, duration) / duration;
renderer.material.Lerp (material1, material2, lerp);
}

Is there anyway to use the y-coordinate of the mesh so the transition gradually moves up the gameobject, or would this require writing a shader?

Thank you.

2

You will need to write a shader for this, Material.Lerp only lerps the properties, which does not cover your special effect you mentioned.

3

As I suspected. A bit of a daunting task.