The character controllers step offset in meters.
// Set the controller step offset to 2.0
var controller : CharacterController;
controller = GetComponent.<CharacterController>();
controller.stepOffset = 2.0;
using UnityEngine; using System.Collections;
public class ExampleClass : MonoBehaviour { public CharacterController controller; void Example() { controller = GetComponent<CharacterController>(); controller.stepOffset = 2.0F; } }