lerping speedtree material

Unity Engine
1

Hello all,

I’d like to lerp a GameObject between two SpeedTree materials, which are basically the same, only with a change of colors within the shaders.

Ideally I’d like to use something like this

void Update () {
        float lerp = Mathf.Min(Time.time / duration, 1);
        _renderer.material.Lerp(startMaterial, finalMaterial, lerp);
}

I understood from several posts that for general materials I probably had to modify the shader code to interpolate properly.

The shader from SpeedTree materials is compiled and I don’t think it’s editable?!

What would you recommend me to do?
Thanks

2

there is some speedtree shader sources in the buildin shaders zip, check that one.

if you only want to lerp color, wouldnt just adjusting the color work?