Version: 2017.4
public static void LoadOrtho ();



After calling LoadOrtho, the viewing frustum goes from (0,0,-1) to (1,1,100).
LoadOrtho can be used for drawing primitives in 2D.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public Material mat; void OnPostRender() { if (!mat) { Debug.LogError("Please Assign a material on the inspector"); return; } GL.PushMatrix(); mat.SetPass(0); GL.LoadOrtho(); GL.Color(; GL.Begin(GL.TRIANGLES); GL.Vertex3(0.25F, 0.1351F, 0); GL.Vertex3(0.25F, 0.3F, 0); GL.Vertex3(0.5F, 0.3F, 0); GL.End(); GL.Color(Color.yellow); GL.Begin(GL.TRIANGLES); GL.Vertex3(0.5F, 0.25F, -1); GL.Vertex3(0.5F, 0.1351F, -1); GL.Vertex3(0.1F, 0.25F, -1); GL.End(); GL.PopMatrix(); } }