diff --git a/ThermalDynamics/Data/Scripts/Thermodynamics/Settings.cs b/ThermalDynamics/Data/Scripts/Thermodynamics/Settings.cs
index a8ee071..43bd694 100644
--- a/ThermalDynamics/Data/Scripts/Thermodynamics/Settings.cs
+++ b/ThermalDynamics/Data/Scripts/Thermodynamics/Settings.cs
@@ -22,10 +22,14 @@ public class Settings
 		public static Settings Instance;
 
         public static readonly MyStringHash DefaultSubtypeId = MyStringHash.GetOrCompute("DefaultThermodynamics");
+        public static readonly MyStringHash DefaultLowMassSubtypeId = MyStringHash.GetOrCompute("DefaultLowMassThermodynamics");
 
         [ProtoMember(1)]
 		public int Version;
 
+		[ProtoMember(3)]
+		public bool EnableEnvironment;
+
 		[ProtoMember(5)]
 		public bool EnableSolarHeat;
 
@@ -45,18 +49,18 @@ public class Settings
 		[ProtoMember(16)]
 		public float SimulationSpeed;
 
+		/// <summary>
+		/// the temperature in kelven for space
+		/// </summary>
+		[ProtoMember(30)]
+		public float VacuumTemperature;
+
 		/// <summary>
 		/// SolarEnergy = watts/m^2
 		/// </summary>
-		[ProtoMember(110)]
+		[ProtoMember(40)]
 		public float SolarEnergy;
 
-		[ProtoMember(120)]
-		public float EnvironmentalRaycastDistance;
-
-		[ProtoMember(130)]
-		public float VaccumeRadiationStrength;
-
 		[ProtoMember(140)]
 		public float PresurizedAtmoConductivity;
 
@@ -74,20 +78,19 @@ public static Settings GetDefaults()
 		{
 			Settings s = new Settings {
 				Version = 1,
-				EnableSolarHeat = true,	  //atm includes all external heat source
+				EnableEnvironment = true,
+				EnableSolarHeat = false,
 				EnableDamage = true,
 				Frequency = 1,
-				SimulationSpeed = 10,
-                SolarEnergy = 0f, 
-				EnvironmentalRaycastDistance = 5000f,
-				VaccumeRadiationStrength = 0.05f,
+				SimulationSpeed = 1,
+				VacuumTemperature = 2.7f,
+                SolarEnergy = 0f,
 				PresurizedAtmoConductivity = 0.026f,
 				PresurizedAtmoSpecificHeat = 1005,
             };
 
 			s.Init();
-			return s;
-			
+			return s;	
 		}
 
 		private void Init() {
diff --git a/ThermalDynamics/Data/Scripts/Thermodynamics/ThermalCell.cs b/ThermalDynamics/Data/Scripts/Thermodynamics/ThermalCell.cs
index 2f36f23..b16c685 100644
--- a/ThermalDynamics/Data/Scripts/Thermodynamics/ThermalCell.cs
+++ b/ThermalDynamics/Data/Scripts/Thermodynamics/ThermalCell.cs
@@ -458,7 +458,12 @@ private void UpdateFrameAndLastTemperature()
         private float CalculateTotalRadiation()
         {
             float temperatureSquared = Temperature * Temperature;
-            float totalRadiation = Boltzmann * Definition.Emissivity * (temperatureSquared * temperatureSquared) - Grid.FrameAmbientTempratureP4;
+            float totalRadiation = 0;
+
+            if (Settings.Instance.EnableEnvironment) 
+            { 
+                totalRadiation = Boltzmann * Definition.Emissivity * (temperatureSquared * temperatureSquared) - Grid.FrameAmbientTempratureP4;
+            } 
 
             if (Settings.Instance.EnableSolarHeat && !Grid.FrameSolarOccluded)
             {
diff --git a/ThermalDynamics/Data/Scripts/Thermodynamics/ThermalGrid.cs b/ThermalDynamics/Data/Scripts/Thermodynamics/ThermalGrid.cs
index f691a35..f304895 100644
--- a/ThermalDynamics/Data/Scripts/Thermodynamics/ThermalGrid.cs
+++ b/ThermalDynamics/Data/Scripts/Thermodynamics/ThermalGrid.cs
@@ -87,7 +87,7 @@ public partial class ThermalGrid : MyGameLogicComponent
 
         public float FrameAmbientTemprature;
         public float FrameAmbientTempratureP4;
-        public float FrameSolarDecay;
+        //public float FrameSolarDecay;
         public bool FrameSolarOccluded;
 
         public override void Init(MyObjectBuilder_EntityBase objectBuilder)
@@ -403,40 +403,49 @@ private void PrepareNextSimulationStep()
         {
 
             Vector3D position = Grid.PositionComp.WorldAABB.Center;
-            PrepareEnvironmentTemprature(ref position);
             PrepareSolarEnvironment(ref position);
+            PrepareEnvironmentTemprature(ref position);
         }
 
-        private void PrepareEnvironmentTemprature(ref Vector3D position)
-        {
-            PlanetManager.Planet planet = PlanetManager.GetClosestPlanet(position);
-            if (planet == null) return;
-
-
-            bool isUnderground = false;
-            PlanetDefinition def = planet.Definition();
-            Vector3 local = position - planet.Position;
-            Vector3D surfacePointLocal = planet.Entity.GetClosestSurfacePointLocal(ref local);
-            isUnderground = local.LengthSquared() < surfacePointLocal.LengthSquared();
-            float airDensity = planet.Entity.GetAirDensity(position);
-            float windSpeed = planet.Entity.GetWindSpeed(position);
+        private void PrepareEnvironmentTemprature(ref Vector3D position) {
 
+            if (!Settings.Instance.EnableEnvironment) return;
 
-            float ambient = def.UndergroundTemperature;
-            if (!isUnderground)
+            PlanetManager.Planet planet = PlanetManager.GetClosestPlanet(position);
+            float frameAmbiSquared;
+            if (planet == null)
             {
-                float dot = (float)Vector3D.Dot(Vector3D.Normalize(local), FrameSolarDirection);
-                ambient = def.NightTemperature + ((dot + 1f) * 0.5f * (def.DayTemperature - def.NightTemperature));
+                FrameAmbientTemprature = Settings.Instance.VacuumTemperature;
+                frameAmbiSquared = FrameAmbientTemprature * FrameAmbientTemprature;
+                FrameAmbientTempratureP4 = frameAmbiSquared * frameAmbiSquared;
             }
-            else
+            else 
             {
-                FrameSolarOccluded = true;
-            }
+                bool isUnderground = false;
+                PlanetDefinition def = planet.Definition();
+                Vector3 local = position - planet.Position;
+                Vector3D surfacePointLocal = planet.Entity.GetClosestSurfacePointLocal(ref local);
+                isUnderground = local.LengthSquared() < surfacePointLocal.LengthSquared();
+                float airDensity = planet.Entity.GetAirDensity(position);
+                float windSpeed = planet.Entity.GetWindSpeed(position);
 
-            FrameAmbientTemprature = Math.Max(2.7f, ambient * airDensity);
-            float frameAmbiSquared = FrameAmbientTemprature * FrameAmbientTemprature;
-            FrameAmbientTempratureP4 = frameAmbiSquared * frameAmbiSquared;
-            FrameSolarDecay = 1 - def.SolarDecay * airDensity;
+
+                float ambient = def.UndergroundTemperature;
+                if (!isUnderground)
+                {
+                    float dot = (float)Vector3D.Dot(Vector3D.Normalize(local), FrameSolarDirection);
+                    ambient = def.NightTemperature + ((dot + 1f) * 0.5f * (def.DayTemperature - def.NightTemperature));
+                }
+                else
+                {
+                    FrameSolarOccluded = true;
+                }
+
+                FrameAmbientTemprature = Math.Max(Settings.Instance.VacuumTemperature, ambient * airDensity);
+                frameAmbiSquared = FrameAmbientTemprature * FrameAmbientTemprature;
+                FrameAmbientTempratureP4 = frameAmbiSquared * frameAmbiSquared;
+                //FrameSolarDecay = 1 - def.SolarDecay * airDensity;
+            }
 
             //FrameWindDirection = Vector3.Cross(planet.GravityComponent.GetWorldGravityNormalized(position), planet.Entity.WorldMatrix.Forward).Normalized() * windSpeed;
             //MySimpleObjectDraw.DrawLine(position, position + FrameWindDirection, MyStringId.GetOrCompute("Square"), ref color2, 0.1f);
@@ -446,12 +455,14 @@ private void PrepareEnvironmentTemprature(ref Vector3D position)
 
         private void PrepareSolarEnvironment(ref Vector3D position)
         {
+
+            FrameSolarDirection = MyVisualScriptLogicProvider.GetSunDirection();
+
             if (!Settings.Instance.EnableSolarHeat) return;
 
             SolarRadiationNode.Update();
 
             FrameSolarOccluded = false;
-            FrameSolarDirection = MyVisualScriptLogicProvider.GetSunDirection();
             FrameMatrix = Grid.WorldMatrix;
 
             LineD line = new LineD(position, position + (FrameSolarDirection * 15000000));