diff --git a/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/G b/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/G
index 5095d44209f6a69c6d97ba677092b5ed4fea6d30..dcd3b3a64404b9ac9bdc94a548ebd07c6003500c 100644
--- a/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/G
+++ b/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/G
@@ -24,7 +24,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1;
+        emissivityMode  lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }
diff --git a/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/IDefault b/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/IDefault
index 94f365296e9262ca775182d6bba125ae7bd39c16..f122ced6002a3f2c01d98cc81f056c8ee12b4d78 100644
--- a/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/IDefault
+++ b/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/IDefault
@@ -24,7 +24,8 @@ boundaryField
     {
         type            greyDiffusiveRadiation;
         T               T;
-        emissivity      1.0;
+        emissivityMode  lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }
diff --git a/tutorials/combustion/fireFoam/les/smallPoolFire3D/0/IDefault b/tutorials/combustion/fireFoam/les/smallPoolFire3D/0/IDefault
index 32b03c16d5e99f46447a0a02d11c9a3223b1ee33..f6f9481cfd1a5a28c62794f6fd13eff422575363 100644
--- a/tutorials/combustion/fireFoam/les/smallPoolFire3D/0/IDefault
+++ b/tutorials/combustion/fireFoam/les/smallPoolFire3D/0/IDefault
@@ -24,7 +24,8 @@ boundaryField
     {
         type            greyDiffusiveRadiation;
         T               T;
-        emissivity      1.0;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }
diff --git a/tutorials/heatTransfer/buoyantSimpleRadiationFoam/hotRadiationRoom/0/G b/tutorials/heatTransfer/buoyantSimpleRadiationFoam/hotRadiationRoom/0/G
index d49a1b712b778f241fd43b9bf23c315b3d772fc3..04abeb2d7c4943e19567da708ab88bbced59c45e 100644
--- a/tutorials/heatTransfer/buoyantSimpleRadiationFoam/hotRadiationRoom/0/G
+++ b/tutorials/heatTransfer/buoyantSimpleRadiationFoam/hotRadiationRoom/0/G
@@ -24,7 +24,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
 
diff --git a/tutorials/heatTransfer/buoyantSimpleRadiationFoam/hotRadiationRoomFvDOM/0/IDefault b/tutorials/heatTransfer/buoyantSimpleRadiationFoam/hotRadiationRoomFvDOM/0/IDefault
index 94f365296e9262ca775182d6bba125ae7bd39c16..86beefe9f17c57b01d91e7bae85bded53c6ed4ee 100644
--- a/tutorials/heatTransfer/buoyantSimpleRadiationFoam/hotRadiationRoomFvDOM/0/IDefault
+++ b/tutorials/heatTransfer/buoyantSimpleRadiationFoam/hotRadiationRoomFvDOM/0/IDefault
@@ -24,7 +24,8 @@ boundaryField
     {
         type            greyDiffusiveRadiation;
         T               T;
-        emissivity      1.0;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }
diff --git a/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/0/G b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/0/G
index 3652534309de4a1b6ef098682956b048329280a5..4a76429cb96f426b4154ffe41576a039ec07d98d 100644
--- a/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/0/G
+++ b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/0/G
@@ -25,21 +25,24 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1.0;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
     bottom
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1.0;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
     walls
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1.0;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
     symmetry
diff --git a/tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/filter/0/G b/tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/filter/0/G
index 0b83afbf39cb8c1a1df791b61dcc2f7ff489eb30..f3e7ccba7d2cbea839e3f171ce82455865b80fb9 100644
--- a/tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/filter/0/G
+++ b/tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/filter/0/G
@@ -25,7 +25,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
         refValue        uniform 0;
         refGradient     uniform 0;
@@ -35,7 +36,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
         refValue        uniform 0;
         refGradient     uniform 0;
diff --git a/tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/parcelInBox/0/G b/tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/parcelInBox/0/G
index 35d242fe29eea1004cc1ab516c2c77adf174e60e..07bc3518f55a3c25477e5c72592c59828f8d5f78 100644
--- a/tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/parcelInBox/0/G
+++ b/tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/parcelInBox/0/G
@@ -33,7 +33,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
     outlet
@@ -44,7 +45,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }
diff --git a/tutorials/lagrangian/reactingParcelFoam/evaporationTest/0/G b/tutorials/lagrangian/reactingParcelFoam/evaporationTest/0/G
index 002455197ea5ab77a1e19457bef1ca2e51ccee2f..3a9381dbca0b48f2b5f86312de3766ade2fbdf8c 100644
--- a/tutorials/lagrangian/reactingParcelFoam/evaporationTest/0/G
+++ b/tutorials/lagrangian/reactingParcelFoam/evaporationTest/0/G
@@ -25,7 +25,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1.0;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
     frontAndBack