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diff --git a/OpenSim/Region/Framework/Interfaces/ITerrainModule.cs b/OpenSim/Region/Framework/Interfaces/ITerrainModule.cs
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+++ b/OpenSim/Region/Framework/Interfaces/ITerrainModule.cs
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+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * 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 the OpenSimulator Project 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 DEVELOPERS ``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 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.
+ */
+using System.IO;
+
+using OpenSim.Framework;
+
+using OpenMetaverse;
+
+namespace OpenSim.Region.Framework.Interfaces
+{
+    public interface ITerrainModule
+    {
+        void LoadFromFile(string filename);
+        void SaveToFile(string filename);
+        void ModifyTerrain(UUID user, Vector3 pos, byte size, byte action, UUID agentId);
+
+        /// <summary>
+        /// Taint the terrain. This will lead to sending the terrain data to the clients again.
+        /// Use this if you change terrain data outside of the terrain module (e.g. in osTerrainSetHeight)
+        /// </summary>
+        void TaintTerrain();
+        
+        /// <summary>
+        /// When a client initially connects, all the terrain must be pushed to the viewer.
+        /// This call causes all the terrain patches to be sent to the client.
+        /// </summary>
+        void PushTerrain(IClientAPI pClient);
+        
+        /// <summary>
+        /// Load a terrain from a stream.
+        /// </summary>
+        /// <param name="filename">
+        /// Only required here to identify the image type.  Not otherwise used in the loading itself.
+        /// </param>
+        /// <param name="stream"></param>
+        void LoadFromStream(string filename, Stream stream);
+        void LoadFromStream(string filename, Vector3 displacement, float radianRotation, Vector2 rotationDisplacement, Stream stream);
+        void LoadFromStream(string filename, System.Uri pathToTerrainHeightmap);
+        /// <summary>
+        /// Save a terrain to a stream.
+        /// </summary>
+        /// <param name="filename">
+        /// Only required here to identify the image type.  Not otherwise used in the saving itself.
+        /// </param>
+        /// <param name="stream"></param>
+        void SaveToStream(string filename, Stream stream);
+
+        void InstallPlugin(string name, ITerrainEffect plug);
+
+        void UndoTerrain(ITerrainChannel channel);
+    }
+}