diff --git a/src/d_dehacked.cpp b/src/d_dehacked.cpp
index f79924b2b..387e05be5 100644
--- a/src/d_dehacked.cpp
+++ b/src/d_dehacked.cpp
@@ -921,7 +921,7 @@ static int PatchThing (int thingy)
 		{
 			if (stricmp (Line1, "Speed") == 0)
 			{
-				info->Speed = val;	// handle fixed point later.
+				info->Speed = (signed long)val;	// handle fixed point later.
 			}
 			else if (stricmp (Line1, "Width") == 0)
 			{
diff --git a/src/gl/scene/gl_sprite.cpp b/src/gl/scene/gl_sprite.cpp
index e5edcaf97..d144da8fd 100644
--- a/src/gl/scene/gl_sprite.cpp
+++ b/src/gl/scene/gl_sprite.cpp
@@ -270,7 +270,7 @@ void GLSprite::Draw(int pass)
 
 			const bool drawBillboardFacingCamera = gl_billboard_faces_camera;
 			// [Nash] has +ROLLSPRITE
-			const bool drawRollSpriteActor = (actor != NULL && actor->renderflags & RF_ROLLSPRITE);
+			const bool drawRollSpriteActor = (actor != nullptr && actor->renderflags & RF_ROLLSPRITE);
 			gl_RenderState.Apply();
 
 			FVector3 v1;
@@ -280,10 +280,10 @@ void GLSprite::Draw(int pass)
 
 			// [fgsfds] check sprite type mask
 			DWORD spritetype = (DWORD)-1;
-			if (actor != NULL) spritetype = actor->renderflags & RF_SPRITETYPEMASK;
+			if (actor != nullptr) spritetype = actor->renderflags & RF_SPRITETYPEMASK;
 			
 			// [Nash] is a flat sprite
-			const bool isFlatSprite = (actor != NULL) && (spritetype == RF_WALLSPRITE || spritetype == RF_FLATSPRITE);
+			const bool isFlatSprite = (actor != nullptr) && (spritetype == RF_WALLSPRITE || spritetype == RF_FLATSPRITE);
 			const bool dontFlip = (actor != nullptr) && (actor->renderflags & RF_DONTFLIP);
 			const bool useOffsets = (actor != nullptr) && !(actor->renderflags & RF_ROLLCENTER);
 			
@@ -295,8 +295,8 @@ void GLSprite::Draw(int pass)
 				float ycenter = (y1 + y2)*0.5;
 				float zcenter = (z1 + z2)*0.5;
 				float xx = -xcenter + x;
-				float yy = -zcenter + z;
-				float zz = -ycenter + y;
+				float zz = -zcenter + z;
+				float yy = -ycenter + y;
 				Matrix3x4 mat;
 				mat.MakeIdentity();
 				mat.Translate(xcenter, zcenter, ycenter); // move to sprite center
@@ -336,20 +336,22 @@ void GLSprite::Draw(int pass)
 				// Here we need some form of priority in order to work.
 				if (spritetype == RF_FLATSPRITE)
 				{
-					DVector3 diff = actor->Vec3To(GLRenderer->mViewActor);
+					float pitchDegrees = -actor->Angles.Pitch.Degrees;
+					DVector3 apos = { x, y, z };
+					DVector3 diff = ViewPos - apos;
 					DAngle angto = diff.Angle();
+
 					angto = deltaangle(actor->Angles.Yaw, angto);
 
-					float pitchDegrees = -actor->Angles.Pitch.Degrees;
 					bool noFlipSprite = (!dontFlip || (fabs(angto) < 90.));
 					mat.Rotate(0, 1, 0, (noFlipSprite) ? 0 : 180);
 
 					mat.Rotate(-yawvecY, 0, yawvecX, (noFlipSprite) ? -pitchDegrees : pitchDegrees);
 					if (drawRollSpriteActor)
 					{
-						if (useOffsets)	mat.Translate(xx, yy, zz);
+						if (useOffsets)	mat.Translate(xx, zz, yy);
 						mat.Rotate(yawvecX, 0, yawvecY, (noFlipSprite) ? -rollDegrees : rollDegrees);
-						if (useOffsets) mat.Translate(-xx, -yy, -zz);
+						if (useOffsets) mat.Translate(-xx, -zz, -yy);
 					}
 				}
 				// [fgsfds] Rotate the sprite about the sight vector (roll) 
@@ -358,20 +360,20 @@ void GLSprite::Draw(int pass)
 					mat.Rotate(0, 1, 0, 0);
 					if (drawRollSpriteActor)
 					{
-						if (useOffsets)	mat.Translate(xx, yy, zz);
+						if (useOffsets)	mat.Translate(xx, zz, yy);
 						mat.Rotate(yawvecX, 0, yawvecY, rollDegrees);
-						if (useOffsets) mat.Translate(-xx, -yy, -zz);
+						if (useOffsets) mat.Translate(-xx, -zz, -yy);
 					}
 				}
 				else if (drawRollSpriteActor)
 				{
-					if (useOffsets) mat.Translate(xx, yy, zz);
+					if (useOffsets) mat.Translate(xx, zz, yy);
 					if (drawWithXYBillboard)
 					{
 						mat.Rotate(-sin(angleRad), 0, cos(angleRad), -GLRenderer->mAngles.Pitch.Degrees);
 					}
 					mat.Rotate(cos(angleRad), 0, sin(angleRad), rollDegrees);
-					if (useOffsets) mat.Translate(-xx, -yy, -zz);
+					if (useOffsets) mat.Translate(-xx, -zz, -yy);
 				}
 				
 				// apply the transform
diff --git a/src/menu/menudef.cpp b/src/menu/menudef.cpp
index ad3a82314..d2db8e21e 100644
--- a/src/menu/menudef.cpp
+++ b/src/menu/menudef.cpp
@@ -658,7 +658,7 @@ static EColorRange ParseOptionColor(FScanner &sc, FOptionMenuDescriptor *desc)
 	if (sc.CheckString(","))
 	{
 		sc.MustGetString();
-		EColorRange cr = V_FindFontColor(sc.String);
+		cr = V_FindFontColor(sc.String);
 		if (cr == CR_UNTRANSLATED && !sc.Compare("untranslated") && isdigit(sc.String[0]))
 		{
 			if (strtol(sc.String, NULL, 0)) cr = OptionSettings.mFontColorHeader;
diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index 919834a06..01953cad9 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -3719,6 +3719,7 @@ enum
 	APROP_DamageMultiplier=43,
 	APROP_MaxStepHeight	= 44,
 	APROP_MaxDropOffHeight= 45,
+	APROP_DamageType	= 46,
 };
 
 // These are needed for ACS's APROP_RenderStyle
@@ -3978,6 +3979,9 @@ void DLevelScript::DoSetActorProperty (AActor *actor, int property, int value)
 		actor->MaxDropOffHeight = ACSToDouble(value);
 		break;
 
+	case APROP_DamageType:
+		actor->DamageType = FBehavior::StaticLookupString(value);
+		break;
 
 	default:
 		// do nothing.
@@ -4081,6 +4085,7 @@ int DLevelScript::GetActorProperty (int tid, int property)
 	case APROP_Friction:	return DoubleToACS(actor->Friction);
 	case APROP_MaxStepHeight: return DoubleToACS(actor->MaxStepHeight);
 	case APROP_MaxDropOffHeight: return DoubleToACS(actor->MaxDropOffHeight);
+	case APROP_DamageType:	return GlobalACSStrings.AddString(actor->DamageType);
 
 	default:				return 0;
 	}
@@ -4153,6 +4158,7 @@ int DLevelScript::CheckActorProperty (int tid, int property, int value)
 		case APROP_ActiveSound:	string = actor->ActiveSound; break; 
 		case APROP_Species:		string = actor->GetSpecies(); break;
 		case APROP_NameTag:		string = actor->GetTag(); break;
+		case APROP_DamageType:	string = actor->DamageType; break;
 	}
 	if (string == NULL) string = "";
 	return (!stricmp(string, FBehavior::StaticLookupString(value)));
diff --git a/src/p_pspr.cpp b/src/p_pspr.cpp
index 2e285b34a..bad9c2d73 100644
--- a/src/p_pspr.cpp
+++ b/src/p_pspr.cpp
@@ -1085,9 +1085,8 @@ DEFINE_ACTION_FUNCTION(AInventory, A_Lower)
 	}
 	if (player->playerstate == PST_DEAD)
 	{ // Player is dead, so don't bring up a pending weapon
-		psp->y = WEAPONBOTTOM;
-	
 		// Player is dead, so keep the weapon off screen
+		P_SetPsprite(player, PSP_FLASH, nullptr);
 		psp->SetState(nullptr);
 		return 0;
 	}
@@ -1171,50 +1170,39 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_ClearOverlays)
 	PARAM_INT_OPT(stop) { stop = 0; }
 	PARAM_BOOL_OPT(safety) { safety = true; }
 
-	if (!self->player)
+	if (self->player == nullptr)
 		ACTION_RETURN_INT(0);
 
-	player_t *player = self->player;
 	if (!start && !stop)
 	{
 		start = INT_MIN;
 		stop = safety ? PSP_TARGETCENTER - 1 : INT_MAX;
 	}
 
-	int count = 0;
-	DPSprite *pspr = player->psprites;
-	int startID = (pspr != nullptr) ? pspr->GetID() : start;
-	bool first = true;
-	while (pspr != nullptr)
-	{
-		if (pspr->GetID() == startID)
-		{
-			if (first)
-				first = false;
-			else
-				break;
-		}
-		int id = pspr->GetID();
+	unsigned int count = 0;
+	int id;
 
-		//Do not wipe out layer 0. Ever.
-		if (!id || id < start)
+	for (DPSprite *pspr = self->player->psprites; pspr != nullptr; pspr = pspr->GetNext())
+	{
+		id = pspr->GetID();
+
+		if (id < start || id == 0)
 			continue;
-		if (id > stop)
+		else if (id > stop)
 			break;
 
 		if (safety)
 		{
 			if (id >= PSP_TARGETCENTER)
 				break;
-			else if ((id >= PSP_STRIFEHANDS && id <= PSP_WEAPON) || (id == PSP_FLASH))
+			else if (id == PSP_STRIFEHANDS || id == PSP_WEAPON || id == PSP_FLASH)
 				continue;
 		}
 
-		// [MC]Don't affect non-hardcoded layers unless it's really desired.
 		pspr->SetState(nullptr);
 		count++;
-		pspr = pspr->GetNext();
 	}
+
 	ACTION_RETURN_INT(count);
 }
 
diff --git a/src/posix/cocoa/i_main.mm b/src/posix/cocoa/i_main.mm
index 5729a3716..bbe344809 100644
--- a/src/posix/cocoa/i_main.mm
+++ b/src/posix/cocoa/i_main.mm
@@ -220,8 +220,8 @@ int OriginalMain(int argc, char** argv)
 
 
 @interface ApplicationController : NSResponder
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
-	<NSFileManagerDelegate>
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
+	<NSApplicationDelegate>
 #endif
 {
 }
diff --git a/src/r_plane.cpp b/src/r_plane.cpp
index d749319e3..ff23492ab 100644
--- a/src/r_plane.cpp
+++ b/src/r_plane.cpp
@@ -1677,7 +1677,7 @@ void R_DrawTiltedPlane (visplane_t *pl, double _xscale, double _yscale, fixed_t
 	// the textures a constant size across the surface's plane instead.
 	cosine = cos(planeang), sine = sin(planeang);
 	m[1] = pl->height.ZatPoint(ViewPos.X + yscale * sine, ViewPos.Y + yscale * cosine) - zeroheight;
-	n[1] = pl->height.ZatPoint(ViewPos.X - xscale * cosine, ViewPos.Y + xscale * sine) - zeroheight;
+	n[1] = -(pl->height.ZatPoint(ViewPos.X - xscale * cosine, ViewPos.Y + xscale * sine) - zeroheight);
 
 	plane_su = p ^ m;
 	plane_sv = p ^ n;
diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index 63ba6ec30..ef41faea2 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -6129,6 +6129,7 @@ enum DMSS
 	DMSS_EXFILTER			= 64,	//Changes filter into a blacklisted class instead of whitelisted.
 	DMSS_EXSPECIES			= 128,	// ^ but with species instead.
 	DMSS_EITHER				= 256,  //Allow either type or species to be affected.
+	DMSS_INFLICTORDMGTYPE	= 512,	//Ignore the passed damagetype and use the inflictor's instead.
 };
 
 static void DoDamage(AActor *dmgtarget, AActor *inflictor, AActor *source, int amount, FName DamageType, int flags, PClassActor *filter, FName species)
@@ -6153,6 +6154,9 @@ static void DoDamage(AActor *dmgtarget, AActor *inflictor, AActor *source, int a
 	
 		if (amount > 0)
 		{ //Should wind up passing them through just fine.
+			if (flags & DMSS_INFLICTORDMGTYPE)
+				DamageType = inflictor->DamageType;
+
 			P_DamageMobj(dmgtarget, inflictor, source, amount, DamageType, dmgFlags);
 		}
 		else if (amount < 0)
diff --git a/wadsrc/static/actors/constants.txt b/wadsrc/static/actors/constants.txt
index 46e810a7f..ba0d1399d 100644
--- a/wadsrc/static/actors/constants.txt
+++ b/wadsrc/static/actors/constants.txt
@@ -38,6 +38,9 @@ const int CBAF_NORANDOM = 2;
 const int CBAF_EXPLICITANGLE = 4;
 const int CBAF_NOPITCH = 8;
 const int CBAF_NORANDOMPUFFZ = 16;
+const int CBAF_PUFFTARGET = 32;
+const int CBAF_PUFFMASTER = 64;
+const int CBAF_PUFFTRACER = 128;
 
 // Flags for A_GunFlash
 const int GFF_NOEXTCHANGE = 1;
@@ -210,6 +213,9 @@ const int CPF_STEALARMOR = 32;
 const int FPF_AIMATANGLE = 1;
 const int FPF_TRANSFERTRANSLATION = 2;
 const int FPF_NOAUTOAIM = 4;
+const int FBF_PUFFTARGET = 64;
+const int FBF_PUFFMASTER = 128;
+const int FBF_PUFFTRACER = 256;
 
 // Flags for A_Teleport
 enum
@@ -460,6 +466,7 @@ enum
 	DMSS_EXFILTER =			0x00000040,
 	DMSS_EXSPECIES =		0x00000080,
 	DMSS_EITHER =			0x00000100,
+	DMSS_INFLICTORDMGTYPE =	0x00000200,
 };
 
 // Flags for A_AlertMonsters