Decrease the current quality level.

	QualitySettings.DecreaseLevel(false);

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        QualitySettings.DecreaseLevel(false);
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		QualitySettings.DecreaseLevel(false)