diff --git a/src/g_shared/a_dynlight.cpp b/src/g_shared/a_dynlight.cpp
index 90e81d281f..b3cac45ae0 100644
--- a/src/g_shared/a_dynlight.cpp
+++ b/src/g_shared/a_dynlight.cpp
@@ -324,7 +324,7 @@ void ADynamicLight::Tick()
 		if (scale == 0.f) scale = 1.f;
 		
 		intensity = Sector->lightlevel * scale;
-		intensity = clamp<float>(intensity, 0.f, 255.f);
+		intensity = clamp<float>(intensity, 0.f, 1024.f);
 		
 		m_currentRadius = intensity;
 		break;
diff --git a/src/gl/scene/gl_weapon.cpp b/src/gl/scene/gl_weapon.cpp
index 78c32cc07e..ff2321da5e 100644
--- a/src/gl/scene/gl_weapon.cpp
+++ b/src/gl/scene/gl_weapon.cpp
@@ -244,7 +244,7 @@ void GLSceneDrawer::DrawPlayerSprites(sector_t * viewsector, bool hudModelStep)
 	}
 	else
 	{
-		fakesec    = gl_FakeFlat(viewsector, &fs, in_area, false);
+		fakesec = gl_FakeFlat(viewsector, &fs, in_area, false);
 
 		// calculate light level for weapon sprites
 		lightlevel = gl_ClampLight(fakesec->lightlevel);
@@ -282,7 +282,7 @@ void GLSceneDrawer::DrawPlayerSprites(sector_t * viewsector, bool hudModelStep)
 
 		lightlevel = gl_CalcLightLevel(lightlevel, getExtraLight(), true);
 
-		if (glset.lightmode == 8)
+		if (glset.lightmode == 8 || lightlevel < 92)
 		{
 			// Korshun: the way based on max possible light level for sector like in software renderer.
 			float min_L = 36.0 / 31.0 - ((lightlevel / 255.0) * (63.0 / 31.0)); // Lightlevel in range 0-63
diff --git a/src/namedef.h b/src/namedef.h
index db492c1b27..a22a5de5f0 100644
--- a/src/namedef.h
+++ b/src/namedef.h
@@ -334,6 +334,8 @@ xx(FRandom)
 xx(Random2)
 xx(RandomPick)
 xx(FRandomPick)
+xx(SetRandomSeed)
+xx(BuiltinRandomSeed)
 xx(GetClass)
 xx(GetParentClass)
 xx(GetClassName)
diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index 8565bc42ab..fa62ac2c12 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -9537,7 +9537,7 @@ scriptwait:
 				}
 				else
 				{
-					STACK(1) = DoubleToACS(pcd == PCD_GETACTORX ? actor->X() : pcd == PCD_GETACTORY ? actor->Y() : actor->Z());
+					STACK(1) = DoubleToACS(pcd == PCD_GETACTORX ? actor->X() : actor->Y());
 				}
 			}
 			break;
diff --git a/src/scripting/backend/codegen.cpp b/src/scripting/backend/codegen.cpp
index f088bc2430..0613b91bde 100644
--- a/src/scripting/backend/codegen.cpp
+++ b/src/scripting/backend/codegen.cpp
@@ -5906,6 +5906,82 @@ ExpEmit FxRandom2::Emit(VMFunctionBuilder *build)
 	return out;
 }
 
+//==========================================================================
+//
+//
+//
+//==========================================================================
+FxRandomSeed::FxRandomSeed(FRandom * r, FxExpression *s, const FScriptPosition &pos, bool nowarn)
+	: FxExpression(EFX_Random, pos)
+{
+	EmitTail = false;
+	seed = new FxIntCast(s, nowarn);
+	rng = r;
+	ValueType = TypeVoid;
+}
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+FxRandomSeed::~FxRandomSeed()
+{
+	SAFE_DELETE(seed);
+}
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+FxExpression *FxRandomSeed::Resolve(FCompileContext &ctx)
+{
+	CHECKRESOLVED();
+	RESOLVE(seed, ctx);
+	return this;
+};
+
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+int BuiltinRandomSeed(VMValue *param, TArray<VMValue> &defaultparam, int numparam, VMReturn *ret, int numret)
+{
+	PARAM_PROLOGUE;
+	PARAM_POINTER(rng, FRandom)
+	PARAM_INT(seed);
+	rng->Init(seed);
+	return 0;
+}
+
+ExpEmit FxRandomSeed::Emit(VMFunctionBuilder *build)
+{
+	// Call DecoRandom to generate a random number.
+	VMFunction *callfunc;
+	PSymbol *sym = FindBuiltinFunction(NAME_BuiltinRandomSeed, BuiltinRandomSeed);
+
+	assert(sym->IsKindOf(RUNTIME_CLASS(PSymbolVMFunction)));
+	assert(((PSymbolVMFunction *)sym)->Function != nullptr);
+	callfunc = ((PSymbolVMFunction *)sym)->Function;
+
+	if (build->FramePointer.Fixed) EmitTail = false;	// do not tail call if the stack is in use
+	int opcode = (EmitTail ? OP_TAIL_K : OP_CALL_K);
+
+	build->Emit(OP_PARAM, 0, REGT_POINTER | REGT_KONST, build->GetConstantAddress(rng));
+	EmitParameter(build, seed, ScriptPosition);
+	build->Emit(opcode, build->GetConstantAddress(callfunc), 2, 1);
+
+	ExpEmit call;
+	if (EmitTail) call.Final = true;
+	return call;
+}
+
 //==========================================================================
 //
 //
@@ -7537,6 +7613,7 @@ FxFunctionCall::FxFunctionCall(FName methodname, FName rngname, FArgumentList &a
 		case NAME_RandomPick:
 		case NAME_FRandomPick:
 		case NAME_Random2:
+		case NAME_SetRandomSeed:
 			RNG = FRandom::StaticFindRNG(rngname.GetChars());
 			break;
 
@@ -7790,6 +7867,14 @@ FxExpression *FxFunctionCall::Resolve(FCompileContext& ctx)
 		}
 		break;
 
+	case NAME_SetRandomSeed:
+		if (CheckArgSize(NAME_Random, ArgList, 1, 1, ScriptPosition))
+		{
+			func = new FxRandomSeed(RNG, ArgList[0], ScriptPosition, ctx.FromDecorate);
+			ArgList[0] = nullptr;
+		}
+		break;
+
 	case NAME_Random:
 		// allow calling Random without arguments to default to (0, 255)
 		if (ArgList.Size() == 0)
diff --git a/src/scripting/backend/codegen.h b/src/scripting/backend/codegen.h
index 004b1f2289..2121eff7a4 100644
--- a/src/scripting/backend/codegen.h
+++ b/src/scripting/backend/codegen.h
@@ -1321,6 +1321,27 @@ public:
 };
 
 
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+class FxRandomSeed : public FxExpression
+{
+protected:
+	bool EmitTail;
+	FRandom *rng;
+	FxExpression *seed;
+
+public:
+
+	FxRandomSeed(FRandom *, FxExpression *mi, const FScriptPosition &pos, bool nowarn);
+	~FxRandomSeed();
+	FxExpression *Resolve(FCompileContext&);
+	ExpEmit Emit(VMFunctionBuilder *build);
+};
+
 //==========================================================================
 //
 //	FxMemberBase
diff --git a/wadsrc/static/compatibility.txt b/wadsrc/static/compatibility.txt
index 8e856ecbb8..8fc64f3bff 100644
--- a/wadsrc/static/compatibility.txt
+++ b/wadsrc/static/compatibility.txt
@@ -493,11 +493,6 @@ AB24AE6E2CB13CBDD04600A4D37F9189 // doom2.wad map02
 	setwalltexture 338 front bot STONE4
 	setwalltexture 339 front bot STONE4
 }
-5E8679670469F92E15CF4219B5B98FEF // doom2.wad map03
-{
-	// unmarked secret
-	setsectorspecial 62 1024
-}
 CEC791136A83EEC4B91D39718BDF9D82 // doom2.wad map04
 {
 	// missing textures
@@ -526,21 +521,9 @@ CEC791136A83EEC4B91D39718BDF9D82 // doom2.wad map04
 }
 66C46385EB1A23D60839D1532522076B // doom2.wad map08
 {
+	// missing texture
 	setwalltexture 101 back top BRICK7
 }
-6C620F43705BEC0ABBABBF46AC3E62D2 // doom2.wad map10
-{
-	// unmarked secrets
-	setsectorspecial 25 1090
-	setsectorspecial 137 1024
-	setsectorspecial 176 1024
-}
-73D9E03CEE7BF1A97EFD2EAD86688EF8 // doom2.wad map11
-{
-	// unmarked secrets
-	setsectorspecial 94 1024
-	setsectorspecial 138 1024	
-}
 1A540BA717BF9EC85F8522594C352F2A // Doom II, map15
 {
 	setsectorspecial 147 0