GL.MultiTexCoord2
static function MultiTexCoord2(unit: int, x: float, y: float): void;
static void MultiTexCoord2(int unit, float x, float y);
static def MultiTexCoord2(unit as int, x as float, y as float) as void
Description

Sets current texture coordinate (x,y) for the actual texture unit.

In OpenGL this matches glMultiTexCoord for the given texture unit if multi-texturing is available. On other graphics APIs the same functionality is emulated.

This function can only be called between GL.Begin and GL.End functions.
	// Changes between two textures assigned to a material
	// When pressed space
	var mat : Material;
	private var flagTex : boolean = true;
	function Update() {
		if (Input.GetKeyDown(KeyCode.Space)) {
			if(flagTex) {
				flagTex = false;
			} else {
				flagTex = true;
			}
		}
	}

function OnPostRender() { if (!mat) { Debug.LogError("Please Assign a material on the inspector"); return; } GL.PushMatrix(); mat.SetPass(1); GL.LoadOrtho(); GL.Begin(GL.QUADS); if (flagTex) { GL.MultiTexCoord2(0,0,0); // main texture } else { GL.MultiTexCoord2(1,0,0); // second texture } GL.Vertex3(0.25,0.25,0); if (flagTex) { GL.MultiTexCoord2(0,0,1); } else { GL.MultiTexCoord2(1,0,1); } GL.Vertex3(0.25,0.75,0); if (flagTex) { GL.MultiTexCoord2(0,1,1); } else { GL.MultiTexCoord2(1,1,1); } GL.Vertex3(0.75,0.75,0); if (flagTex) { GL.MultiTexCoord2(0,1,0); } else { GL.MultiTexCoord2(1,1,0); } GL.Vertex3(0.75,0.25,0); GL.End(); GL.PopMatrix(); }
using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    public Material mat;
    private bool flagTex = true;
    void Update() {
        if (Input.GetKeyDown(KeyCode.Space))
            if (flagTex)
                flagTex = false;
            else
                flagTex = true;
        
    }
    void OnPostRender() {
        if (!mat) {
            Debug.LogError("Please Assign a material on the inspector");
            return;
        }
        GL.PushMatrix();
        mat.SetPass(1);
        GL.LoadOrtho();
        GL.Begin(GL.QUADS);
        if (flagTex)
            GL.MultiTexCoord2(0, 0, 0);
        else
            GL.MultiTexCoord2(1, 0, 0);
        GL.Vertex3(0.25F, 0.25F, 0);
        if (flagTex)
            GL.MultiTexCoord2(0, 0, 1);
        else
            GL.MultiTexCoord2(1, 0, 1);
        GL.Vertex3(0.25F, 0.75F, 0);
        if (flagTex)
            GL.MultiTexCoord2(0, 1, 1);
        else
            GL.MultiTexCoord2(1, 1, 1);
        GL.Vertex3(0.75F, 0.75F, 0);
        if (flagTex)
            GL.MultiTexCoord2(0, 1, 0);
        else
            GL.MultiTexCoord2(1, 1, 0);
        GL.Vertex3(0.75F, 0.25F, 0);
        GL.End();
        GL.PopMatrix();
    }
}
import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	public mat as Material

	private flagTex as bool = true

	def Update() as void:
		if Input.GetKeyDown(KeyCode.Space):
			if flagTex:
				flagTex = false
			else:
				flagTex = true

	def OnPostRender() as void:
		if not mat:
			Debug.LogError('Please Assign a material on the inspector')
			return
		GL.PushMatrix()
		mat.SetPass(1)
		GL.LoadOrtho()
		GL.Begin(GL.QUADS)
		if flagTex:
			GL.MultiTexCoord2(0, 0, 0)
		else:
			GL.MultiTexCoord2(1, 0, 0)
		GL.Vertex3(0.25F, 0.25F, 0)
		if flagTex:
			GL.MultiTexCoord2(0, 0, 1)
		else:
			GL.MultiTexCoord2(1, 0, 1)
		GL.Vertex3(0.25F, 0.75F, 0)
		if flagTex:
			GL.MultiTexCoord2(0, 1, 1)
		else:
			GL.MultiTexCoord2(1, 1, 1)
		GL.Vertex3(0.75F, 0.75F, 0)
		if flagTex:
			GL.MultiTexCoord2(0, 1, 0)
		else:
			GL.MultiTexCoord2(1, 1, 0)
		GL.Vertex3(0.75F, 0.25F, 0)
		GL.End()
		GL.PopMatrix()