diff --git a/src/scripting/vmthunks.cpp b/src/scripting/vmthunks.cpp
index 6e3705781..b5fa6a918 100644
--- a/src/scripting/vmthunks.cpp
+++ b/src/scripting/vmthunks.cpp
@@ -2926,6 +2926,7 @@ DEFINE_FIELD_X(Sector, sector_t, terrainnum)
 DEFINE_FIELD_X(Sector, sector_t, floordata)
 DEFINE_FIELD_X(Sector, sector_t, ceilingdata)
 DEFINE_FIELD_X(Sector, sector_t, lightingdata)
+DEFINE_FIELD_X(Sector, sector_t, Level)
 DEFINE_FIELD_X(Sector, sector_t, interpolations)
 DEFINE_FIELD_X(Sector, sector_t, soundtraversed)
 DEFINE_FIELD_X(Sector, sector_t, stairlock)
diff --git a/wadsrc/static/zscript/base.txt b/wadsrc/static/zscript/base.txt
index 2860273c8..070f3f033 100644
--- a/wadsrc/static/zscript/base.txt
+++ b/wadsrc/static/zscript/base.txt
@@ -693,7 +693,7 @@ struct LevelLocals native
 	native String GetUDMFString(int type, int index, Name key);
 	native int GetUDMFInt(int type, int index, Name key);
 	native double GetUDMFFloat(int type, int index, Name key);
-	native int ExecuteSpecial(int special, Actor activator, line linedef, bool lineside, int arg1 = 0, int arg2 = 0, int arg3 = 0, int arg4 = 0, int arg5 = 0);
+	native play int ExecuteSpecial(int special, Actor activator, line linedef, bool lineside, int arg1 = 0, int arg2 = 0, int arg3 = 0, int arg4 = 0, int arg5 = 0);
 	native void GiveSecret(Actor activator, bool printmsg = true, bool playsound = true);
 	native void StartSlideshow(Name whichone = 'none');
 	native void WorldDone();
@@ -705,35 +705,35 @@ struct LevelLocals native
 	native bool IsCrouchingAllowed() const;
 	native bool IsFreelookAllowed() const;
 	native void StartIntermission(Name type, int state) const;
-	native SpotState GetSpotState(bool create = true);
+	native play SpotState GetSpotState(bool create = true);
 	native int FindUniqueTid(int start = 0, int limit = 0);
 	native uint GetSkyboxPortal(Actor actor);
 	native void ReplaceTextures(String from, String to, int flags);
     clearscope native HealthGroup FindHealthGroup(int id);
 	native vector3, int PickDeathmatchStart();
 	native vector3, int PickPlayerStart(int pnum, int flags = 0);
-	native int isFrozen();
+	native int isFrozen() const;
 	native void setFrozen(bool on);
 
-	native clearscope Sector PointInSector(Vector2 pt);
+	native clearscope Sector PointInSector(Vector2 pt) const;
 
-	native clearscope bool IsPointInLevel(vector3 p);
+	native clearscope bool IsPointInLevel(vector3 p) const;
 	deprecated("3.8") clearscope static bool IsPointInMap(vector3 p)
 	{
 		return level.IsPointInLevel(p);
 	}
 
-	native clearscope vector2 Vec2Diff(vector2 v1, vector2 v2);
-	native clearscope vector3 Vec3Diff(vector3 v1, vector3 v2);
-	native clearscope vector3 SphericalCoords(vector3 viewpoint, vector3 targetPos, vector2 viewAngles = (0, 0), bool absolute = false);
+	native clearscope vector2 Vec2Diff(vector2 v1, vector2 v2) const;
+	native clearscope vector3 Vec3Diff(vector3 v1, vector3 v2) const;
+	native clearscope vector3 SphericalCoords(vector3 viewpoint, vector3 targetPos, vector2 viewAngles = (0, 0), bool absolute = false) const;
 	
-	native clearscope vector2 Vec2Offset(vector2 pos, vector2 dir, bool absolute = false);
-	native clearscope vector3 Vec2OffsetZ(vector2 pos, vector2 dir, double atz, bool absolute = false);
-	native clearscope vector3 Vec3Offset(vector3 pos, vector3 dir, bool absolute = false);
+	native clearscope vector2 Vec2Offset(vector2 pos, vector2 dir, bool absolute = false) const;
+	native clearscope vector3 Vec2OffsetZ(vector2 pos, vector2 dir, double atz, bool absolute = false) const;
+	native clearscope vector3 Vec3Offset(vector3 pos, vector3 dir, bool absolute = false) const;
 
 	native String GetChecksum() const;
 
-	native void ChangeSky( TextureID sky1, TextureID sky2 );
+	native void ChangeSky(TextureID sky1, TextureID sky2 );
 
 	native SectorTagIterator CreateSectorTagIterator(int tag, line defline = null);
 	native LineIdIterator CreateLineIdIterator(int tag);
@@ -745,8 +745,8 @@ struct LevelLocals native
 		return String.Format("%02d:%02d:%02d", sec / 3600, (sec % 3600) / 60, sec % 60);
 	}
 
-	native bool CreateCeiling(sector sec, int type, line ln, double speed, double speed2, double height = 0, int crush = -1, int silent = 0, int change = 0, int crushmode = 0 /*Floor.crushDoom*/);
-	native bool CreateFloor(sector sec, int floortype, line ln, double speed, double height = 0, int crush = -1, int change = 0, bool crushmode = false, bool hereticlower = false);
+	native play bool CreateCeiling(sector sec, int type, line ln, double speed, double speed2, double height = 0, int crush = -1, int silent = 0, int change = 0, int crushmode = 0 /*Floor.crushDoom*/);
+	native play bool CreateFloor(sector sec, int floortype, line ln, double speed, double height = 0, int crush = -1, int change = 0, bool crushmode = false, bool hereticlower = false);
 
 }
 
diff --git a/wadsrc/static/zscript/mapdata.txt b/wadsrc/static/zscript/mapdata.txt
index 4a1154feb..02e78fe7f 100644
--- a/wadsrc/static/zscript/mapdata.txt
+++ b/wadsrc/static/zscript/mapdata.txt
@@ -97,15 +97,15 @@ struct Side native play
 	
 	int GetUDMFInt(Name nm)
 	{
-		return Level.GetUDMFInt(LevelLocals.UDMF_Side, Index(), nm);
+		return sector.Level.GetUDMFInt(LevelLocals.UDMF_Side, Index(), nm);
 	}
 	double GetUDMFFloat(Name nm)
 	{
-		return Level.GetUDMFFloat(LevelLocals.UDMF_Side, Index(), nm);
+		return sector.Level.GetUDMFFloat(LevelLocals.UDMF_Side, Index(), nm);
 	}
 	String GetUDMFString(Name nm)
 	{
-		return Level.GetUDMFString(LevelLocals.UDMF_Side, Index(), nm);
+		return sector.Level.GetUDMFString(LevelLocals.UDMF_Side, Index(), nm);
 	}
 	
 };
@@ -180,15 +180,15 @@ struct Line native play
 	
 	int GetUDMFInt(Name nm)
 	{
-		return Level.GetUDMFInt(LevelLocals.UDMF_Line, Index(), nm);
+		return frontsector.Level.GetUDMFInt(LevelLocals.UDMF_Line, Index(), nm);
 	}
 	double GetUDMFFloat(Name nm)
 	{
-		return Level.GetUDMFFloat(LevelLocals.UDMF_Line, Index(), nm);
+		return frontsector.Level.GetUDMFFloat(LevelLocals.UDMF_Line, Index(), nm);
 	}
 	String GetUDMFString(Name nm)
 	{
-		return Level.GetUDMFString(LevelLocals.UDMF_Line, Index(), nm);
+		return frontsector.Level.GetUDMFString(LevelLocals.UDMF_Line, Index(), nm);
 	}
 
     native clearscope int GetHealth();
@@ -259,6 +259,7 @@ struct Sector native play
 	native SectorEffect floordata;
 	native SectorEffect ceilingdata;
 	native SectorEffect lightingdata;
+	native readonly LevelLocals Level;
 
 	enum EPlane
 	{
diff --git a/wadsrc/static/zscript/shared/specialspot.txt b/wadsrc/static/zscript/shared/specialspot.txt
index fdf357b2a..fd6192d87 100644
--- a/wadsrc/static/zscript/shared/specialspot.txt
+++ b/wadsrc/static/zscript/shared/specialspot.txt
@@ -1,4 +1,4 @@
-class SpotState : Object native
+class SpotState : Object native play
 {
 	deprecated ("3.8") static SpotState GetSpotState(bool create = true)
 	{