Version: 2017.2
public AnimatorControllerLayer[] layers ;

Description

The layers in the controller.

It's important to note that the AnimatorControllerLayer are returned as a copy. The array should be set back into the property when changed.

class ControllerModifier
{
    UnityEditor.Animations.AnimatorController controller;

public void ModifyLayers(int layerIndex, string newName) { UnityEditor.Animations.AnimatorControllerLayer[] layers = controller.layers; layers[layerIndex].name = newName; controller.layers = layers; } }