QualitySettings.masterTextureLimit
static var masterTextureLimit: int;
static int masterTextureLimit;
static masterTextureLimit as int
Description

A texture size limit applied to all textures.

Setting this to one uses the first mipmap of each texture (so all textures are half size), setting this to two uses the second mipmap of each texture (so all textures are quarter size), etc.. This can be used to decrease video memory requirements on low-end computers. The default value is zero.
	// Use half-size textures.

QualitySettings.masterTextureLimit = 1;
using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        QualitySettings.masterTextureLimit = 1;
    }
}
import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		QualitySettings.masterTextureLimit = 1