diff --git a/OpenSim/Region/Physics/UbitOdePlugin/ODEDynamics.cs b/OpenSim/Region/Physics/UbitOdePlugin/ODEDynamics.cs
index a7dda7acd2..3c952ae7fe 100644
--- a/OpenSim/Region/Physics/UbitOdePlugin/ODEDynamics.cs
+++ b/OpenSim/Region/Physics/UbitOdePlugin/ODEDynamics.cs
@@ -137,6 +137,7 @@ namespace OpenSim.Region.Physics.OdePlugin
         float m_amdampY;
         float m_amdampZ;
 
+        float m_gravmod;
 
         public float FrictionFactor
         {
@@ -146,6 +147,14 @@ namespace OpenSim.Region.Physics.OdePlugin
             }
         }
 
+        public float GravMod
+        {
+            set
+            {
+                m_gravmod = value;
+            }
+        }
+
 
         public ODEDynamics(OdePrim rootp)
         {
@@ -153,6 +162,7 @@ namespace OpenSim.Region.Physics.OdePlugin
             _pParentScene = rootPrim._parent_scene;
             m_timestep = _pParentScene.ODE_STEPSIZE;
             m_invtimestep = 1.0f / m_timestep;
+            m_gravmod = rootPrim.GravModifier;
         }
 
         public void DoSetVehicle(VehicleData vd)
@@ -816,7 +826,7 @@ namespace OpenSim.Region.Physics.OdePlugin
                 m_lmEfect = 0;
                 m_ffactor = 1f;
             }
-
+           
             // hover
             if (m_VhoverTimescale < 300 && rootPrim.prim_geom != IntPtr.Zero)
             {
@@ -862,7 +872,7 @@ namespace OpenSim.Region.Physics.OdePlugin
                     force.Z += perr;
                     ldampZ *= -curVel.Z;
 
-                    force.Z += _pParentScene.gravityz * (1f - m_VehicleBuoyancy);
+                    force.Z += _pParentScene.gravityz * m_gravmod * (1f - m_VehicleBuoyancy);
                 }
                 else // no buoyancy
                     force.Z += _pParentScene.gravityz;
@@ -870,7 +880,7 @@ namespace OpenSim.Region.Physics.OdePlugin
             else
             {
                 // default gravity and Buoyancy
-                force.Z += _pParentScene.gravityz * (1f - m_VehicleBuoyancy);
+                force.Z += _pParentScene.gravityz * m_gravmod * (1f - m_VehicleBuoyancy);
             }
 
             // linear deflection
@@ -1063,8 +1073,7 @@ namespace OpenSim.Region.Physics.OdePlugin
                 torque.Y -= curLocalAngVel.Y * m_amdampY;
                 torque.Z -= curLocalAngVel.Z * m_amdampZ;
             }
-
-            
+          
 
             if (force.X != 0 || force.Y != 0 || force.Z != 0)
             {
diff --git a/OpenSim/Region/Physics/UbitOdePlugin/ODEPrim.cs b/OpenSim/Region/Physics/UbitOdePlugin/ODEPrim.cs
index 7cabddd18f..e3f88c688e 100644
--- a/OpenSim/Region/Physics/UbitOdePlugin/ODEPrim.cs
+++ b/OpenSim/Region/Physics/UbitOdePlugin/ODEPrim.cs
@@ -115,6 +115,7 @@ namespace OpenSim.Region.Physics.OdePlugin
 
         private int body_autodisable_frames;
         public int bodydisablecontrol;
+        private float m_gravmod = 1.0f;
 
 
         // Default we're a Geometry
@@ -914,6 +915,55 @@ namespace OpenSim.Region.Physics.OdePlugin
             bounce = _parent_scene.m_materialContactsData[pMaterial].bounce;
         }
 
+        public override float Density
+        {
+            get
+            {
+                return m_density * 100f;
+            }
+            set
+            {
+                m_density = value / 100f;
+                // for not prim mass is not updated since this implies full rebuild of body inertia TODO
+            }
+        }
+        public override float GravModifier
+        {
+            get
+            {
+                return m_gravmod;
+            }
+            set
+            {
+                m_gravmod = value;
+                if (m_vehicle != null)
+                    m_vehicle.GravMod = m_gravmod;
+            }
+        }
+        public override float Friction
+        {
+            get
+            {
+                return mu;
+            }
+            set
+            {
+                mu = value;
+            }
+        }
+
+        public override float Restitution
+        {
+            get
+            {
+                return bounce;
+            }
+            set
+            {
+                bounce = value;
+            }
+        }
+
         public void setPrimForRemoval()
         {
             AddChange(changes.Remove, null);
@@ -3336,7 +3386,7 @@ namespace OpenSim.Region.Physics.OdePlugin
                 }
                 else
                 {
-                    float b = (1.0f - m_buoyancy);
+                    float b = (1.0f - m_buoyancy) * m_gravmod;
                     fx = _parent_scene.gravityx * b;
                     fy = _parent_scene.gravityy * b;
                     fz = _parent_scene.gravityz * b;