Set The AA Filtering option.
The AntiAliazing filter can be set to either 0,2,4 or 8. This coresponds to the number of multisamples used per pixel
// Set AntiAliasing to use 2x MultisamplingQualitySettings.antiAliasing = 2;
using UnityEngine;using System.Collections;public class example : MonoBehaviour { void Example() { QualitySettings.antiAliasing = 2; }}
import UnityEngineimport System.Collectionsclass example(MonoBehaviour): def Example(): QualitySettings.antiAliasing = 2