* New Terrain Module (disabled, search for 'usingTerrainModule = false' to reenable)

* *Much* faster terraforming (woot!)
* New "Brushes" design, so you can create custom terraforming brushes then apply those inplace of the standard tools. (ie an Erode Brush for example)
* New specialised "Flood Brushes" to do large area effects, ie, raise-area, now takes a bitmap rather than repeats the ordinary raise brush a thousand times.
* New modular file Load/Save systems -- write importers/exporters for multiple formats without having to hard code the whole thing in.
* Coming soon - effects system, ie the old Erosion functions, etc. for one-shot effects.

OpenSim/Region/Environment/Scenes/Scene.cs

@@ -869,7 +869,7 @@ namespace OpenSim.Region.Environment.Scenes
 
         public void SendTerrainUpdate(bool checkForTainted)
         {
-            float[] terData = Terrain.GetHeights1D();
+            float[] terData = Heightmap.GetFloatsSerialised();
 
             Broadcast(delegate(IClientAPI client)
             {

OpenSim/Region/Environment/Scenes/SceneBase.cs

@@ -112,7 +112,7 @@ namespace OpenSim.Region.Environment.Scenes
         /// <param name="RemoteClient">Client to send to</param>
         public virtual void SendLayerData(IClientAPI RemoteClient)
         {
-            bool usingTerrainModule = true;
+            bool usingTerrainModule = false;
 
             if (usingTerrainModule)
             {