diff --git a/OpenSim/Region/Physics/Meshing/Meshmerizer.cs b/OpenSim/Region/Physics/Meshing/Meshmerizer.cs
index 55a1bec2b7..df850a0d1f 100644
--- a/OpenSim/Region/Physics/Meshing/Meshmerizer.cs
+++ b/OpenSim/Region/Physics/Meshing/Meshmerizer.cs
@@ -1858,7 +1858,6 @@ namespace OpenSim.Region.Physics.Meshing
             Console.WriteLine("skew: " + skew.ToString() + " profileXComp: " + profileXComp.ToString());
 #endif
 
-            
             foreach (Vertex v in m.vertices)
                 if (v != null)
                 {
@@ -2173,14 +2172,31 @@ namespace OpenSim.Region.Physics.Meshing
             //    }
             //}
 
-            if (mesh != null && size.X < minSizeForComplexMesh && size.Y < minSizeForComplexMesh && size.Z < minSizeForComplexMesh)
-            {
+            if (mesh != null)
+                if (size.X < minSizeForComplexMesh && size.Y < minSizeForComplexMesh && size.Z < minSizeForComplexMesh)
+                {
 #if SPAM
                 Console.WriteLine("Meshmerizer: prim " + primName + " has a size of " + size.ToString() + " which is below threshold of " + minSizeForComplexMesh.ToString() + " - creating simple bounding box" );
 #endif
-                mesh = CreateBoundingBoxMesh(mesh);
-                mesh.DumpRaw(baseDir, primName, "Z extruded");
-            }
+                    mesh = CreateBoundingBoxMesh(mesh);
+                    mesh.DumpRaw(baseDir, primName, "Z extruded");
+
+                    // trim the vertex and triangle lists to free up memory
+                    //mesh.vertices.TrimExcess();
+                    //mesh.triangles.TrimExcess();
+
+                    int vertCount = 0;
+                    foreach (Vertex v in mesh.vertices)
+                        if (v != null)
+                            vertCount++;
+                    mesh.vertices.Capacity = vertCount;
+
+                    int triCount = 0;
+                    foreach (Triangle t in mesh.triangles)
+                        if ( t != null )
+                            triCount++;
+                    mesh.triangles.Capacity = triCount;
+                }
 
             return mesh;
         }