diff --git a/src/gamedata/d_dehacked.cpp b/src/gamedata/d_dehacked.cpp
index 2f61c9128..e974aacb1 100644
--- a/src/gamedata/d_dehacked.cpp
+++ b/src/gamedata/d_dehacked.cpp
@@ -1154,8 +1154,7 @@ static int PatchThing (int thingy)
 	while ((result = GetLine ()) == 1)
 	{
 		char *endptr;
-		uint64_t val64 = strtoull (Line2, &endptr, 10);
-		uint32_t val = (uint32_t)val64;
+		uint32_t val = (uint32_t)strtoull (Line2, &endptr, 10);
 		size_t linelen = strlen (Line1);
 
 		if (linelen == 10 && stricmp (Line1, "Hit points") == 0)
@@ -1174,6 +1173,7 @@ static int PatchThing (int thingy)
 		{
 			info->Alpha = DEHToDouble(val);
 			info->RenderStyle = STYLE_Translucent;
+			info->renderflags &= ~RF_ZDOOMTRANS;
 			hadTranslucency = true;
 			hadStyle = true;
 		}
@@ -1474,10 +1474,10 @@ static int PatchThing (int thingy)
 						// This is different from BOUNCE_Heretic behavior as in Heretic the missiles
 						// die when they bounce, while in MBF they will continue to bounce until they
 						// collide with a wall or a solid actor.
-						if (value[0] & MF_MISSILE) info->BounceFlags = BOUNCE_Classic;
+						if (value[0] & MF_MISSILE) info->BounceFlags = BOUNCE_Classic | BOUNCE_DEH;
 						// MBF bouncing actors that do not have the missile flag will also rebound on
 						// walls, and this does correspond roughly to the ZDoom bounce style.
-						else info->BounceFlags = BOUNCE_Grenade;
+						else info->BounceFlags = BOUNCE_Grenade | BOUNCE_DEH;
 
 						// MBF grenades are dehacked rockets that gain the BOUNCES flag but
 						// lose the MISSILE flag, so they can be identified here easily.
@@ -1487,27 +1487,13 @@ static int PatchThing (int thingy)
 							info->effects |= FX_GRENADE;	// by grenade trail
 						}
 
-						// MBF bounce factors depend on flag combos:
-						const double MBF_BOUNCE_NOGRAVITY = 1;				// With NOGRAVITY: full momentum
-						const double MBF_BOUNCE_FLOATDROPOFF = 0.85;		// With FLOAT and DROPOFF: 85%
-						const double MBF_BOUNCE_FLOAT = 0.7;				// With FLOAT alone: 70%
-						const double MBF_BOUNCE_DEFAULT = 0.45;				// Without the above flags: 45%
-						const double MBF_BOUNCE_WALL = 0.5;					// Bouncing off walls: 50%
+						// bounce factors are dynamic, we only set some defaults here.
+						info->bouncefactor = 0.45;
+						info->wallbouncefactor = 0.85;
 
-						info->bouncefactor = ((value[0] & MF_NOGRAVITY) ? MBF_BOUNCE_NOGRAVITY
-							: (value[0] & MF_FLOAT) ? (value[0] & MF_DROPOFF) ? MBF_BOUNCE_FLOATDROPOFF
-							: MBF_BOUNCE_FLOAT : MBF_BOUNCE_DEFAULT);
-
-						info->wallbouncefactor = ((value[0] & MF_NOGRAVITY) ? MBF_BOUNCE_NOGRAVITY : MBF_BOUNCE_WALL);
-
-						// MBF sentient actors with BOUNCE and FLOAT are able to "jump" by floating up.
-						if (info->IsSentient())
-						{
-							if (value[0] & MF_FLOAT) info->flags6 |= MF6_CANJUMP;
-						}
-						// Non sentient actors can be damaged but they shouldn't bleed.
-						else
+						if (!info->IsSentient())
 						{
+							// Non sentient actors can be damaged but they shouldn't bleed.
 							value[0] |= MF_NOBLOOD;
 						}
 					}
@@ -1581,6 +1567,7 @@ static int PatchThing (int thingy)
 						else if (value[2] & 4)
 							info->Alpha = 0.75;
 						info->RenderStyle = STYLE_Translucent;
+						info->renderflags &= ~RF_ZDOOMTRANS;
 					}
 					if (value[2] & 8)
 						info->renderflags |= RF_INVISIBLE;
@@ -3652,6 +3639,7 @@ struct FlagHandler
 #define F2(flag) { [](AActor* a) { a->flags2 |= flag; }, [](AActor* a) { a->flags2 &= ~flag; }, [](AActor* a)->bool { return a->flags2 & flag; } }
 #define F3(flag) { [](AActor* a) { a->flags3 |= flag; }, [](AActor* a) { a->flags3 &= ~flag; }, [](AActor* a)->bool { return a->flags3 & flag; } }
 #define F4(flag) { [](AActor* a) { a->flags4 |= flag; }, [](AActor* a) { a->flags4 &= ~flag; }, [](AActor* a)->bool { return a->flags4 & flag; } }
+#define F6(flag) { [](AActor* a) { a->flags6 |= flag; }, [](AActor* a) { a->flags6 &= ~flag; }, [](AActor* a)->bool { return a->flags6 & flag; } }
 #define F8(flag) { [](AActor* a) { a->flags8 |= flag; }, [](AActor* a) { a->flags8 &= ~flag; }, [](AActor* a)->bool { return a->flags8 & flag; } }
 #define DEPF(flag) { [](AActor* a) { HandleDeprecatedFlags(a, nullptr, true, flag); }, [](AActor* a) { HandleDeprecatedFlags(a, nullptr, false, flag); }, [](AActor* a)->bool { return CheckDeprecatedFlags(a, nullptr, flag); } }
 
@@ -3741,6 +3729,99 @@ void ClearFullVol(AActor* a)
 	a->flags3 &= ~MF3_FULLVOLDEATH;
 }
 
+void SetTranslucent(AActor* a)
+{
+	a->RenderStyle = STYLE_Translucent;
+	a->Alpha = 0.5;
+	a->renderflags &= ~RF_ZDOOMTRANS;
+}
+
+void ClearTranslucent(AActor* a)
+{
+	a->RenderStyle = STYLE_Normal;
+	a->Alpha = 1;
+	a->renderflags &= ~RF_ZDOOMTRANS;
+}
+
+bool CheckTranslucent(AActor* a)
+{
+	// This is solely for MBF21. It will treat all objects with ZDOOMTRANS as non-translucent to ensure consistent results.
+	// This also means that all translucency changes via Dehacked need to clear this flag.
+	return !(a->renderflags & RF_ZDOOMTRANS) && a->Alpha < 1 - FLT_EPSILON;
+}
+
+constexpr int t0 = 0;
+constexpr int t1 = TRANSLATION(TRANSLATION_Standard, 0);
+constexpr int t2 = TRANSLATION(TRANSLATION_Standard, 1);
+constexpr int t3 = TRANSLATION(TRANSLATION_Standard, 2);
+
+void SetTranslation1(AActor* a)
+{
+	if (a->Translation == t2 || a->Translation == t3) a->Translation = t3;
+	else a->Translation = t1;
+}
+
+void ClearTranslation1(AActor* a)
+{
+	if (a->Translation == t3 || a->Translation == t2) a->Translation = t2;
+	else a->Translation = t0;
+}
+
+bool CheckTranslation1(AActor* a)
+{
+	return a->Translation == t1 || a->Translation == t3;
+}
+
+void SetTranslation2(AActor* a)
+{
+	if (a->Translation == t1 || a->Translation == t3) a->Translation = t3;
+	else a->Translation = t2;
+}
+
+void ClearTranslation2(AActor* a)
+{
+	if (a->Translation == t3 || a->Translation == t1) a->Translation = t1;
+	else a->Translation = t0;
+}
+
+bool CheckTranslation2(AActor* a)
+{
+	return a->Translation == t2 || a->Translation == t3;
+}
+
+// Bounces is very complex...
+void SetBounces(AActor* info)
+{
+	info->flags6 |= MF6_VULNERABLE;
+	info->flags3 |= MF3_NOBLOCKMONST;
+	info->flags4 |= (MF4_FORCERADIUSDMG | MF4_DONTHARMCLASS);
+	info->effects &= ~FX_ROCKET;	// disable rocket trail if set.
+
+	if (info->flags & MF_MISSILE) info->BounceFlags = BOUNCE_Classic | BOUNCE_DEH;
+	else info->BounceFlags = BOUNCE_Grenade | BOUNCE_DEH;
+
+}
+
+void ClearBounces(AActor* info)
+{
+	info->flags6 &= ~MF6_VULNERABLE;
+	info->flags3 &= ~MF3_NOBLOCKMONST;
+	info->flags4 &= ~(MF4_FORCERADIUSDMG | MF4_DONTHARMCLASS);
+	info->BounceFlags = 0;
+}
+
+// The missile flag affects the bouncing mode.
+void SetMissile(AActor* info)
+{
+	info->flags |= MF_MISSILE;
+	if (info->BounceFlags & BOUNCE_DEH) info->BounceFlags = BOUNCE_Classic | BOUNCE_DEH;
+}
+
+void ClearMissile(AActor* info)
+{
+	info->flags &= ~MF_MISSILE;
+	if (info->BounceFlags & BOUNCE_DEH) info->BounceFlags = BOUNCE_Grenade | BOUNCE_DEH;
+}
 
 static FlagHandler flag1handlers[32] = {
 	F(MF_SPECIAL),
@@ -3759,7 +3840,7 @@ static FlagHandler flag1handlers[32] = {
 	F(MF_SLIDE),
 	F(MF_FLOAT),
 	F(MF_TELEPORT),
-	F(MF_MISSILE),
+	{ SetMissile, ClearMissile, [](AActor* a)->bool { return a->flags & MF_MISSILE; } },
 	F(MF_DROPPED),
 	F(MF_SHADOW),
 	F(MF_NOBLOOD),
@@ -3769,7 +3850,12 @@ static FlagHandler flag1handlers[32] = {
 	{ SetCountitem, ClearCountitem, [](AActor* a)->bool { return a->flags & MF_COUNTITEM; } },
 	F(MF_SKULLFLY),
 	F(MF_NOTDMATCH),
-	// translation, unused and translucent are no longer checkable in any way. Pity.
+	{ SetTranslation1, ClearTranslation1, CheckTranslation1 },
+	{ SetTranslation2, ClearTranslation2, CheckTranslation2 },
+	F6(MF6_TOUCHY),
+	{ SetBounces, ClearBounces, [](AActor* a)->bool { return a->BounceFlags & BOUNCE_DEH; } },
+	F(MF_FRIENDLY),
+	{ SetTranslucent, ClearTranslucent, CheckTranslucent }
 };
 
 static FlagHandler flag2handlers[32] = {
diff --git a/src/playsim/actor.h b/src/playsim/actor.h
index 87d4fb926..d2a5d7519 100644
--- a/src/playsim/actor.h
+++ b/src/playsim/actor.h
@@ -508,6 +508,7 @@ enum ActorBounceFlag
 	BOUNCE_NotOnShootables = 1<<15,	// do not bounce off shootable actors if we are a projectile. Explode instead.
 	BOUNCE_BounceOnUnrips = 1<<16,	// projectile bounces on actors with DONTRIP
 	BOUNCE_NotOnSky = 1<<17,		// Don't bounce on sky floors / ceilings / walls
+	BOUNCE_DEH = 1<<18,				// Flag was set through Dehacked.
 
 	BOUNCE_TypeMask = BOUNCE_Walls | BOUNCE_Floors | BOUNCE_Ceilings | BOUNCE_Actors | BOUNCE_AutoOff | BOUNCE_HereticType | BOUNCE_MBF,
 
diff --git a/src/playsim/actorinlines.h b/src/playsim/actorinlines.h
index 78015bb2d..c2485bdbd 100644
--- a/src/playsim/actorinlines.h
+++ b/src/playsim/actorinlines.h
@@ -207,4 +207,39 @@ inline bool P_IsBlockedByLine(AActor* actor, line_t* line)
 	if ((actor->flags & MF_FLOAT) && (line->flags & ML_BLOCK_FLOATERS)) return true;
 
 	return false;
+}
+
+// For Dehacked modified actors we need to dynamically check the bounce factors because MBF didn't bother to implement this properly and with other flags changing this must adjust.
+inline double GetMBFBounceFactor(AActor* actor)
+{
+	if (actor->BounceFlags & BOUNCE_DEH) // only when modified through Dehacked. 
+	{
+		constexpr double MBF_BOUNCE_NOGRAVITY = 1;				// With NOGRAVITY: full momentum
+		constexpr double MBF_BOUNCE_FLOATDROPOFF = 0.85;		// With FLOAT and DROPOFF: 85%
+		constexpr double MBF_BOUNCE_FLOAT = 0.7;				// With FLOAT alone: 70%
+		constexpr double MBF_BOUNCE_DEFAULT = 0.45;				// Without the above flags: 45%
+
+		if (actor->flags & MF_NOGRAVITY) return MBF_BOUNCE_NOGRAVITY;
+		if (actor->flags & MF_FLOAT) return (actor->flags & MF_DROPOFF) ? MBF_BOUNCE_FLOATDROPOFF : MBF_BOUNCE_FLOAT;
+		return MBF_BOUNCE_DEFAULT;
+	}
+	return actor->bouncefactor;
+}
+
+inline double GetWallBounceFactor(AActor* actor)
+{
+	if (actor->BounceFlags & BOUNCE_DEH) // only when modified through Dehacked. 
+	{
+		constexpr double MBF_BOUNCE_NOGRAVITY = 1;				// With NOGRAVITY: full momentum
+		constexpr double MBF_BOUNCE_WALL = 0.5;					// Bouncing off walls: 50%
+		return ((actor->flags & MF_NOGRAVITY) ? MBF_BOUNCE_NOGRAVITY : MBF_BOUNCE_WALL);
+	}
+	return actor->wallbouncefactor;
+}
+
+// Yet another hack for MBF...
+inline bool CanJump(AActor* actor)
+{
+	return (actor->flags6 & MF6_CANJUMP) || (
+		(actor->BounceFlags & BOUNCE_MBF) && actor->IsSentient() && (actor->flags & MF_FLOAT));
 }
\ No newline at end of file
diff --git a/src/playsim/p_enemy.cpp b/src/playsim/p_enemy.cpp
index 16c565c70..4c45eb389 100644
--- a/src/playsim/p_enemy.cpp
+++ b/src/playsim/p_enemy.cpp
@@ -445,7 +445,7 @@ int P_Move (AActor *actor)
 	// want to yank them to the ground here as Doom did, since that makes
 	// it difficult to thrust them vertically in a reasonable manner.
 	// [GZ] Let jumping actors jump.
-	if (!((actor->flags & MF_NOGRAVITY) || (actor->flags6 & MF6_CANJUMP))
+	if (!((actor->flags & MF_NOGRAVITY) || CanJump(actor))
 		&& actor->Z() > actor->floorz && !(actor->flags2 & MF2_ONMOBJ))
 	{
 		return false;
@@ -558,7 +558,7 @@ int P_Move (AActor *actor)
 	// to the floor if it is within MaxStepHeight, presuming that it is
 	// actually walking down a step.
 	if (try_ok &&
-		!((actor->flags & MF_NOGRAVITY) || (actor->flags6 & MF6_CANJUMP))
+		!((actor->flags & MF_NOGRAVITY) || CanJump(actor))
 			&& actor->Z() > actor->floorz && !(actor->flags2 & MF2_ONMOBJ))
 	{
 		if (actor->Z() <= actor->floorz + actor->MaxStepHeight)
@@ -585,7 +585,7 @@ int P_Move (AActor *actor)
 
 	if (!try_ok)
 	{
-		if (((actor->flags6 & MF6_CANJUMP)||(actor->flags & MF_FLOAT)) && tm.floatok)
+		if ((CanJump(actor) || (actor->flags & MF_FLOAT)) && tm.floatok)
 		{ // must adjust height
 			double savedz = actor->Z();
 
@@ -596,7 +596,7 @@ int P_Move (AActor *actor)
 
 
 			// [RH] Check to make sure there's nothing in the way of the float
-			if (P_TestMobjZ (actor))
+			if (P_TestMobjZ(actor))
 			{
 				actor->flags |= MF_INFLOAT;
 				return true;
diff --git a/src/playsim/p_map.cpp b/src/playsim/p_map.cpp
index 57cd60518..a6784e00e 100644
--- a/src/playsim/p_map.cpp
+++ b/src/playsim/p_map.cpp
@@ -3486,7 +3486,7 @@ bool FSlide::BounceWall(AActor *mo)
 	deltaangle = (lineangle * 2) - moveangle;
 	mo->Angles.Yaw = deltaangle;
 
-	movelen = mo->Vel.XY().Length() * mo->wallbouncefactor;
+	movelen = mo->Vel.XY().Length() * GetWallBounceFactor(mo);
 
 	FBoundingBox box(mo->X(), mo->Y(), mo->radius);
 	if (BoxOnLineSide(box, line) == -1)
@@ -3573,7 +3573,7 @@ bool P_BounceActor(AActor *mo, AActor *BlockingMobj, bool ontop)
 		if (!ontop)
 		{
 			DAngle angle = BlockingMobj->AngleTo(mo) + ((pr_bounce() % 16) - 8);
-			double speed = mo->VelXYToSpeed() * mo->wallbouncefactor; // [GZ] was 0.75, using wallbouncefactor seems more consistent
+			double speed = mo->VelXYToSpeed() * GetWallBounceFactor(mo); // [GZ] was 0.75, using wallbouncefactor seems more consistent
 			if (fabs(speed) < EQUAL_EPSILON) speed = 0;
 			mo->Angles.Yaw = angle;
 			mo->VelFromAngle(speed);
@@ -3595,7 +3595,7 @@ bool P_BounceActor(AActor *mo, AActor *BlockingMobj, bool ontop)
 				}
 				else
 				{
-					mo->Vel.Z *= mo->bouncefactor;
+					mo->Vel.Z *= GetMBFBounceFactor(mo);
 				}
 			}
 			else // Don't run through this for MBF-style bounces
diff --git a/src/playsim/p_mobj.cpp b/src/playsim/p_mobj.cpp
index 4c772f323..324efe969 100644
--- a/src/playsim/p_mobj.cpp
+++ b/src/playsim/p_mobj.cpp
@@ -1608,7 +1608,7 @@ bool AActor::FloorBounceMissile (secplane_t &plane)
 			flags &= ~MF_INBOUNCE;
 			return false;
 		}
-		else Vel.Z *= bouncefactor;
+		else Vel.Z *= GetMBFBounceFactor(this);
 	}
 	else // Don't run through this for MBF-style bounces
 	{
@@ -2551,7 +2551,7 @@ void P_ZMovement (AActor *mo, double oldfloorz)
 				if (mo->BounceFlags & BOUNCE_Floors)
 				{
 					mo->FloorBounceMissile (mo->floorsector->floorplane);
-					/* if (!(mo->flags6 & MF6_CANJUMP)) */ return;
+					/* if (!CanJump(mo)) */ return;
 				}
 				else if (mo->flags3 & MF3_NOEXPLODEFLOOR)
 				{
@@ -2660,7 +2660,7 @@ void P_ZMovement (AActor *mo, double oldfloorz)
 			if (mo->BounceFlags & BOUNCE_Ceilings)
 			{	// ceiling bounce
 				mo->FloorBounceMissile (mo->ceilingsector->ceilingplane);
-				/*if (!(mo->flags6 & MF6_CANJUMP))*/ return;
+				/* if (!CanJump(mo)) */ return;
 			}
 			if (mo->flags & MF_SKULLFLY)
 			{	// the skull slammed into something