diff --git a/Source/Core/Rendering/Renderer2D.cs b/Source/Core/Rendering/Renderer2D.cs
index 4f84f205..3ba9c230 100644
--- a/Source/Core/Rendering/Renderer2D.cs
+++ b/Source/Core/Rendering/Renderer2D.cs
@@ -660,7 +660,7 @@ namespace CodeImp.DoomBuilder.Rendering
 			//find lines with 3d floor action and collect sector tags
 			foreach(Linedef l in General.Map.Map.Linedefs)
 			{
-				if(l.Action == 160) 
+				if(l.Action >= 100 && l.Action < 300) 
 				{
 					int sectortag = (General.Map.UDMF || (l.Args[1] & 8) != 0) ? l.Args[0] : l.Args[0] + (l.Args[4] << 8);
 					if(sectortag != 0 && !tags.Contains(sectortag)) tags.Add(sectortag);
diff --git a/Source/Plugins/3DFloorMode/BuilderPlug.cs b/Source/Plugins/3DFloorMode/BuilderPlug.cs
index 833e1a64..102d7d9c 100644
--- a/Source/Plugins/3DFloorMode/BuilderPlug.cs
+++ b/Source/Plugins/3DFloorMode/BuilderPlug.cs
@@ -776,7 +776,7 @@ namespace CodeImp.DoomBuilder.ThreeDFloorMode
 				if (ld.Front == null || ld.Front.Sector == null || ld.Front.Sector.IsDisposed || (General.Map.UDMF && ld.Front.Sector.Fields.GetValue("user_managed_3d_floor", false) == false))
 					continue;
 
-				if (ld.Action == 160 && ld.Args[0] != 0)
+				if ((ld.Action >= 100 && ld.Action < 300) && ld.Args[0] != 0)
 				{
 					if (!tags.ContainsKey(ld.Args[0]))
 						tags.Add(ld.Args[0], new List<Sector>() { ld.Front.Sector });
diff --git a/Source/Plugins/3DFloorMode/DrawSlopesMode.cs b/Source/Plugins/3DFloorMode/DrawSlopesMode.cs
index 6a7b5808..74f9b55e 100644
--- a/Source/Plugins/3DFloorMode/DrawSlopesMode.cs
+++ b/Source/Plugins/3DFloorMode/DrawSlopesMode.cs
@@ -542,7 +542,7 @@ namespace CodeImp.DoomBuilder.ThreeDFloorMode
 			//Determine whether or not the sector is actually a control sector for a 3D floor
 			foreach (Sidedef sd in s.Sidedefs)
 			{
-				if (sd.Line.Action == 160)
+				if (sd.Line.Action >= 100 && sd.Line.Action < 300)
 					return true;
 			}
 			return false;
diff --git a/Source/Plugins/3DFloorMode/SlopeVertexGroup.cs b/Source/Plugins/3DFloorMode/SlopeVertexGroup.cs
index 697d8106..c5a138ed 100644
--- a/Source/Plugins/3DFloorMode/SlopeVertexGroup.cs
+++ b/Source/Plugins/3DFloorMode/SlopeVertexGroup.cs
@@ -168,7 +168,7 @@ namespace CodeImp.DoomBuilder.ThreeDFloorMode
 			// tagged sector(s). They will be used for highlighting in slope mode
 			foreach (Sidedef sd in s.Sidedefs)
 			{
-				if (sd.Line.Action == 160)
+				if (sd.Line.Action >= 100 && sd.Line.Action < 300)
 				{
 					foreach (Sector ts in BuilderPlug.GetSectorsByTag(sd.Line.Args[0]))
 					{
diff --git a/Source/Plugins/3DFloorMode/ThreeDFloor.cs b/Source/Plugins/3DFloorMode/ThreeDFloor.cs
index e29911fd..fdda00f2 100644
--- a/Source/Plugins/3DFloorMode/ThreeDFloor.cs
+++ b/Source/Plugins/3DFloorMode/ThreeDFloor.cs
@@ -132,7 +132,7 @@ namespace CodeImp.DoomBuilder.ThreeDFloorMode
 
 			foreach (Sidedef sd in sector.Sidedefs)
 			{
-				if (sd.Line.Action == 160)
+				if (sd.Line.Action >= 100 && sd.Line.Action < 300)
 				{
 					bordertexture = sd.MiddleTexture;
 					udmftag = sd.Line.Args[0];
@@ -197,7 +197,7 @@ namespace CodeImp.DoomBuilder.ThreeDFloorMode
 			if(ldprops != null)
 				ldprops.Apply(new List<Linedef>() { line }, false);
 
-			line.Action = 160;
+			line.Action = 100;
 			line.Args[0] = tag;
 			line.Args[1] = type;
 			line.Args[2] = flags;
@@ -224,7 +224,7 @@ namespace CodeImp.DoomBuilder.ThreeDFloorMode
 			{
 				sd.SetTextureMid(bordertexture);
 
-				if (sd.Line.Action == 160)
+				if (sd.Line.Action >= 100 && sd.Line.Action < 300)
 				{					
 					sd.Line.Args[1] = type;
 					sd.Line.Args[2] = flags;
@@ -315,7 +315,7 @@ namespace CodeImp.DoomBuilder.ThreeDFloorMode
 
 			foreach (Sidedef sd in sector.Sidedefs)
 			{
-				if (sd.Line.Action == 160 && BuilderPlug.GetSectorsByTag(sd.Line.Args[0]).Count == 0)
+				if ((sd.Line.Action >= 100 && sd.Line.Action < 300) && BuilderPlug.GetSectorsByTag(sd.Line.Args[0]).Count == 0)
 				{
 					sd.Line.Action = 0;
 
diff --git a/Source/Plugins/BuilderModes/ClassicModes/DragGeometryMode.cs b/Source/Plugins/BuilderModes/ClassicModes/DragGeometryMode.cs
index 2caf7d1a..572e454c 100755
--- a/Source/Plugins/BuilderModes/ClassicModes/DragGeometryMode.cs
+++ b/Source/Plugins/BuilderModes/ClassicModes/DragGeometryMode.cs
@@ -443,7 +443,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 					// sectors that need updating
 					foreach (Linedef ld in General.Map.Map.Linedefs)
 					{
-						if (ld.Action != 160) // Action 160 defines a 3D floor
+						if (ld.Action < 100 && ld.Action >= 300) // SRB2 FOF types
 							continue;
 
 						foreach (Sector s in draggedsectors)
diff --git a/Source/Plugins/BuilderModes/ClassicModes/EditSelectionMode.cs b/Source/Plugins/BuilderModes/ClassicModes/EditSelectionMode.cs
index d8d02f90..62884a2a 100755
--- a/Source/Plugins/BuilderModes/ClassicModes/EditSelectionMode.cs
+++ b/Source/Plugins/BuilderModes/ClassicModes/EditSelectionMode.cs
@@ -1648,7 +1648,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 					{
 						foreach (Linedef ld in General.Map.Map.Linedefs)
 						{
-							if (ld.Action != 160) // Action 160 defines a 3D floor
+							if (ld.Action < 100 || ld.Action >= 300) // SRB2 FOF types
 								continue;
 
 							if (ld.Args[0] == 0) // First argument of the action is the sector tag. 0 is not a valid value
diff --git a/Source/Plugins/BuilderModes/ErrorChecks/BaseCheckTextures.cs b/Source/Plugins/BuilderModes/ErrorChecks/BaseCheckTextures.cs
index 66f6cfa1..13f84e7d 100644
--- a/Source/Plugins/BuilderModes/ErrorChecks/BaseCheckTextures.cs
+++ b/Source/Plugins/BuilderModes/ErrorChecks/BaseCheckTextures.cs
@@ -82,7 +82,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 
 			foreach (Linedef ld in General.Map.Map.Linedefs)
 			{
-				if (ld.Action == 160)
+				if (ld.Action >= 100 && ld.Action < 300)
 				{
 					if ((ld.Args[1] & 4) == 4) // Type render inside
 					{
diff --git a/Source/Plugins/BuilderModes/IO/WavefrontExporter.cs b/Source/Plugins/BuilderModes/IO/WavefrontExporter.cs
index c86e5108..c4074ffa 100755
--- a/Source/Plugins/BuilderModes/IO/WavefrontExporter.cs
+++ b/Source/Plugins/BuilderModes/IO/WavefrontExporter.cs
@@ -377,7 +377,7 @@ namespace CodeImp.DoomBuilder.BuilderModes.IO
 				{
 					foreach (Sidedef sd in s.Sidedefs)
 					{
-						if (sd.Line.Action == 160)
+						if (sd.Line.Action >= 100 && sd.Line.Action < 300)
 						{
 							addvs = false;
 							break;