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diff --git a/engine/src/core/com/jme3/post/SceneProcessor.java b/engine/src/core/com/jme3/post/SceneProcessor.java
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+/*
+ * Copyright (c) 2009-2010 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.jme3.post;
+
+import com.jme3.renderer.RenderManager;
+import com.jme3.renderer.ViewPort;
+import com.jme3.renderer.queue.RenderQueue;
+import com.jme3.texture.FrameBuffer;
+
+/**
+ * Scene processors are used to compute/render things before and after the classic render of the scene.
+ * They have to be added to a viewport and are rendered in the order they've been added
+ *
+ * @author Kirill Vainer
+ */
+public interface SceneProcessor {
+
+    /**
+     * Called in the render thread to initialize the scene processor.
+     *
+     * @param rm The render manager to which the SP was added to
+     * @param vp The viewport to which the SP is assigned
+     */
+    public void initialize(RenderManager rm, ViewPort vp);
+
+    /**
+     * Called when the resolution of the viewport has been changed.
+     * @param vp
+     */
+    public void reshape(ViewPort vp, int w, int h);
+
+    /**
+     * @return True if initialize() has been called on this SceneProcessor,
+     * false if otherwise.
+     */
+    public boolean isInitialized();
+
+    /**
+     * Called before a frame
+     *
+     * @param tpf Time per frame
+     */
+    public void preFrame(float tpf);
+
+    /**
+     * Called after the scene graph has been queued, but before it is flushed.
+     *
+     * @param rq The render queue
+     */
+    public void postQueue(RenderQueue rq);
+
+    /**
+     * Called after a frame has been rendered and the queue flushed.
+     *
+     * @param out The FB to which the scene was rendered.
+     */
+    public void postFrame(FrameBuffer out);
+
+    /**
+     * Called when the SP is removed from the RM.
+     */
+    public void cleanup();
+
+}