Add RetroSuite-3D shader components

Assets/Scripts/ImageEffects/Posterize.cs

@@ -0,0 +1,51 @@
+/// <summary>
+/// RetroSuite-3D by oxysoft
+/// https://github.com/oxysoft/RetroSuite3D
+/// </summary>
+
+using UnityEngine;
+
+[ExecuteInEditMode]
+[RequireComponent(typeof(Camera))]
+[AddComponentMenu("Image Effects/Posterize")]
+public class Posterize : MonoBehaviour
+{
+    Material mMaterial;
+    Shader shader;
+
+    public int redComponent = 8;
+    public int greenComponent = 8;
+    public int blueComponent = 8;
+
+    Material Material
+    {
+        get
+        {
+            if (mMaterial == null)
+            {
+                shader = Shader.Find("Oxysoft/Posterize");
+                mMaterial = new Material(shader) { hideFlags = HideFlags.DontSave };
+            }
+
+            return mMaterial;
+        }
+    }
+
+    public void OnRenderImage(RenderTexture src, RenderTexture dest)
+    {
+        if (Material)
+        {
+            Material.SetInt("_Red", redComponent);
+            Material.SetInt("_Green", greenComponent);
+            Material.SetInt("_Blue", blueComponent);
+
+            Graphics.Blit(src, dest, Material);
+        }
+    }
+
+    void OnDisable()
+    {
+        if (mMaterial)
+            DestroyImmediate(mMaterial);
+    }
+}