The character controllers slope limit in degrees.
// Set the controller slope limit to 45.0 degrees
var controller : CharacterController;
controller = GetComponent.<CharacterController>();
controller.slopeLimit = 45.0;
using UnityEngine; using System.Collections;
public class ExampleClass : MonoBehaviour { public CharacterController controller; void Example() { controller = GetComponent<CharacterController>(); controller.slopeLimit = 45.0F; } }