A minimalistic hook for rendering world effect overlays or other 3D overlay

data.

forge/forge_client/src/net/minecraft/src/forge/ForgeHooksClient.java

@@ -30,7 +30,16 @@ public class ForgeHooksClient {
 		return false;
 	}
 
-	static LinkedList<IHighlightHandler> highlightHandlers = new LinkedList<IHighlightHandler>();
+	public static void onRenderWorldLast(RenderGlobal rg, float f) {
+		for (IRenderWorldLastHandler handler : renderWorldLastHandlers) {
+			handler.onRenderWorldLast(rg,f);
+		}
+	}
+
+	static LinkedList<IHighlightHandler> highlightHandlers =
+		new LinkedList<IHighlightHandler>();
+	static LinkedList<IRenderWorldLastHandler> renderWorldLastHandlers =
+		new LinkedList<IRenderWorldLastHandler>();
 
 	public static boolean canRenderInPass(Block block, int pass) {
 		if(block instanceof IMultipassRender) {

forge/forge_client/src/net/minecraft/src/forge/IRenderWorldLastHandler.java

@@ -0,0 +1,17 @@
+/*
+ * This software is provided under the terms of the Minecraft Forge Public 
+ * License v1.0.
+ */
+package net.minecraft.src.forge;
+
+import net.minecraft.src.RenderGlobal;
+
+public interface IRenderWorldLastHandler {
+	/** Called after rendering all the 3D data of the world.  This is
+	 * called before the user's tool is rendered, but otherwise after all
+	 * 3D content.  It is called twice in anaglyph mode.  This is intended
+	 * for rendering visual effect overlays into the world.
+	 */
+	void onRenderWorldLast(RenderGlobal rg, float f);
+}
+

forge/patches/minecraft/net/minecraft/src/EntityRenderer.java.patch

@@ -34,3 +34,12 @@
                  GL11.glEnable(3008 /*GL_ALPHA_TEST*/);
              }
              Profiler.endStartSection("weather");
+@@ -988,6 +993,8 @@
+                 setupFog(1, f);
+                 GL11.glPopMatrix();
+             }
++	    Profiler.endStartSection("fhooks");
++	    ForgeHooksClient.onRenderWorldLast(renderglobal,f);
+             Profiler.endStartSection("hand");
+             if(cameraZoom == 1.0D)
+             {