diff --git a/src/p_sectors.cpp b/src/p_sectors.cpp
index 3d77b44c9..8be0862b6 100644
--- a/src/p_sectors.cpp
+++ b/src/p_sectors.cpp
@@ -1779,12 +1779,53 @@ DEFINE_ACTION_FUNCTION(_Sector, NextLowestFloorAt)
 	if (ndx >= level.sectors.Size())
 	{
 		// This qualifies as an array out of bounds exception. Normally it can only happen when a sector copy is concerned which scripts should not be able to create.
-		va_list ap;
-		throw CVMAbortException(X_ARRAY_OUT_OF_BOUNDS, "Accessed invalid sector", ap);
+		ThrowAbortException(X_ARRAY_OUT_OF_BOUNDS, "Accessed invalid sector");
 	}
 	ACTION_RETURN_INT(ndx);
  }
 
+ //===========================================================================
+ //
+ //  line_t exports
+ //
+ //===========================================================================
+
+ DEFINE_ACTION_FUNCTION(_Line, isLinePortal)
+ {
+	 PARAM_SELF_STRUCT_PROLOGUE(line_t);
+	 ACTION_RETURN_BOOL(self->isLinePortal());
+ }
+
+ DEFINE_ACTION_FUNCTION(_Line, isVisualPortal)
+ {
+	 PARAM_SELF_STRUCT_PROLOGUE(line_t);
+	 ACTION_RETURN_BOOL(self->isVisualPortal());
+ }
+
+ DEFINE_ACTION_FUNCTION(_Line, getPortalDestination)
+ {
+	 PARAM_SELF_STRUCT_PROLOGUE(line_t);
+	 ACTION_RETURN_POINTER(self->getPortalDestination());
+ }
+
+ DEFINE_ACTION_FUNCTION(_Line, getPortalAlignment)
+ {
+	 PARAM_SELF_STRUCT_PROLOGUE(line_t);
+	 ACTION_RETURN_INT(self->getPortalAlignment());
+ }
+
+ DEFINE_ACTION_FUNCTION(_Line, Index)
+ {
+	 PARAM_SELF_STRUCT_PROLOGUE(line_t);
+	 unsigned ndx = self->Index();
+	 if (ndx >= level.lines.Size())
+	 {
+		 ThrowAbortException(X_ARRAY_OUT_OF_BOUNDS, "Accessed invalid line");
+	 }
+	 ACTION_RETURN_INT(ndx);
+ }
+
+
 //===========================================================================
 //
 // 
diff --git a/src/scripting/vm/vm.h b/src/scripting/vm/vm.h
index fdf5f3c9f..2e98e865e 100644
--- a/src/scripting/vm/vm.h
+++ b/src/scripting/vm/vm.h
@@ -209,6 +209,9 @@ public:
 	void MaybePrintMessage();
 };
 
+// This must be a separate function because the VC compiler would otherwise allocate memory on the stack for every separate instance of the exception object that may get thrown.
+void ThrowAbortException(EVMAbortException reason, const char *moreinfo, ...);
+
 enum EVMOpMode
 {
 	MODE_ASHIFT		= 0,
diff --git a/src/scripting/vm/vmexec.cpp b/src/scripting/vm/vmexec.cpp
index 3183edcfb..1ad4e3256 100644
--- a/src/scripting/vm/vmexec.cpp
+++ b/src/scripting/vm/vmexec.cpp
@@ -44,9 +44,7 @@
 extern cycle_t VMCycles[10];
 extern int VMCalls[10];
 
-// This must be a separate function because the VC compiler would otherwise allocate memory on the stack for every separate instance of the exception object that may get thrown.
-void ThrowAbortException(EVMAbortException reason, const char *moreinfo, ...);
-// intentionally implemented in a different source file tp prevent inlining.
+// intentionally implemented in a different source file to prevent inlining.
 void ThrowVMException(VMException *x);
 
 #define IMPLEMENT_VMEXEC
diff --git a/wadsrc/static/zscript/base.txt b/wadsrc/static/zscript/base.txt
index b48f0ee58..3dc846f0b 100644
--- a/wadsrc/static/zscript/base.txt
+++ b/wadsrc/static/zscript/base.txt
@@ -240,6 +240,12 @@ struct Line native
 	native int						locknumber;	// [Dusk] lock number for special
 	native readonly uint			portalindex;
 	native readonly uint			portaltransferred;
+	
+	native bool isLinePortal();
+	native bool isVisualPortal();
+	native Line getPortalDestination();
+	native int getPortalAlignment();
+	native int Index();
 }
 
 struct SecPlane native