Is it possible to set the Height and Width of individual Grass Prototypes?

Is it possible to set the Height and Width of individual Grass Prototypes, or is this set up in the shader and affects all similar instances of a single type? I know there is nothing exposed or written in the public documentation, so I am hoping an expert might see this and inform me of some deeper information, or a path to it.

Man i did it, i’m crying!:

#pragma strict
var terrain : Terrain;
var grasscolor : Color;
function Start () {
var grass : DetailPrototype[] = terrain.terrainData.detailPrototypes;
grass[0].maxHeight = 5;
terrain.terrainData.detailPrototypes = grass;
}

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