diff --git a/source/games/duke/src/actors.cpp b/source/games/duke/src/actors.cpp
index a3a8d68ef..295e36d85 100644
--- a/source/games/duke/src/actors.cpp
+++ b/source/games/duke/src/actors.cpp
@@ -490,7 +490,7 @@ void moveplayers(void)
 				act->spr.yrepeat = 36;
 				if (act->sector()->lotag != ST_2_UNDERWATER)
 					makeitfall(act);
-				if (act->int_zvel() == 0 && act->sector()->lotag == ST_1_ABOVE_WATER)
+				if (act->float_zvel() == 0 && act->sector()->lotag == ST_1_ABOVE_WATER)
 					act->spr.pos.Z += 32;
 			}
 
@@ -1031,7 +1031,7 @@ void movewaterdrip(DDukeActor *actor, int drip)
 		ssp(actor, CLIPMASK0);
 		if (actor->spr.xvel > 0) actor->spr.xvel -= 2;
 
-		if (actor->int_zvel() == 0)
+		if (actor->float_zvel() == 0)
 		{
 			actor->spr.cstat |= CSTAT_SPRITE_INVISIBLE;
 
@@ -3926,7 +3926,7 @@ void handle_se18(DDukeActor *actor, bool morecheck)
 						{
 							if (ps[a2->PlayerIndex()].on_ground == 1) ps[a2->PlayerIndex()].pos.Z += extra;
 						}
-						if (a2->int_zvel() == 0 && a2->spr.statnum != STAT_EFFECTOR && a2->spr.statnum != STAT_PROJECTILE)
+						if (a2->float_zvel() == 0 && a2->spr.statnum != STAT_EFFECTOR && a2->spr.statnum != STAT_PROJECTILE)
 						{
 							a2->spr.pos.Z += extra;
 							a2->floorz = sc->floorz;
@@ -3965,7 +3965,7 @@ void handle_se18(DDukeActor *actor, bool morecheck)
 						{
 							if (ps[a2->PlayerIndex()].on_ground == 1) ps[a2->PlayerIndex()].pos.Z -= extra;
 						}
-						if (a2->int_zvel() == 0 && a2->spr.statnum != STAT_EFFECTOR && a2->spr.statnum != STAT_PROJECTILE)
+						if (a2->float_zvel() == 0 && a2->spr.statnum != STAT_EFFECTOR && a2->spr.statnum != STAT_PROJECTILE)
 						{
 							a2->spr.pos.Z -= extra;
 							a2->floorz = sc->floorz;
@@ -4136,7 +4136,7 @@ void handle_se20(DDukeActor* actor)
 		DukeSectIterator it(actor->sector());
 		while (auto a2 = it.Next())
 		{
-			if (a2->spr.statnum != 3 && a2->int_zvel() == 0)
+			if (a2->spr.statnum != 3 && a2->float_zvel() == 0)
 			{
 				a2->add_int_pos({ x, l, 0 });
 				if (a2->sector()->floorstat & CSTAT_SECTOR_SLOPE)
@@ -4657,7 +4657,7 @@ void handle_se31(DDukeActor* actor, bool choosedir)
 						if (a2->isPlayer() && a2->GetOwner())
 							if (ps[a2->PlayerIndex()].on_ground == 1)
 								ps[a2->PlayerIndex()].player_add_int_z(l);
-						if (a2->int_zvel() == 0 && a2->spr.statnum != STAT_EFFECTOR && (!choosedir || a2->spr.statnum != STAT_PROJECTILE))
+						if (a2->float_zvel() == 0 && a2->spr.statnum != STAT_EFFECTOR && (!choosedir || a2->spr.statnum != STAT_PROJECTILE))
 						{
 							a2->add_int_z(l);
 							a2->floorz = sec->floorz;
@@ -4686,7 +4686,7 @@ void handle_se31(DDukeActor* actor, bool choosedir)
 						if (a2->isPlayer() && a2->GetOwner())
 							if (ps[a2->PlayerIndex()].on_ground == 1)
 								ps[a2->PlayerIndex()].player_add_int_z(l);
-						if (a2->int_zvel() == 0 && a2->spr.statnum != STAT_EFFECTOR && (!choosedir || a2->spr.statnum != STAT_PROJECTILE))
+						if (a2->float_zvel() == 0 && a2->spr.statnum != STAT_EFFECTOR && (!choosedir || a2->spr.statnum != STAT_PROJECTILE))
 						{
 							a2->add_int_z(l);
 							a2->floorz = sec->floorz;
@@ -4717,7 +4717,7 @@ void handle_se31(DDukeActor* actor, bool choosedir)
 					if (a2->isPlayer() && a2->GetOwner())
 						if (ps[a2->PlayerIndex()].on_ground == 1)
 							ps[a2->PlayerIndex()].player_add_int_z(l);
-					if (a2->int_zvel() == 0 && a2->spr.statnum != STAT_EFFECTOR && (!choosedir || a2->spr.statnum != STAT_PROJECTILE))
+					if (a2->float_zvel() == 0 && a2->spr.statnum != STAT_EFFECTOR && (!choosedir || a2->spr.statnum != STAT_PROJECTILE))
 					{
 						a2->add_int_z(l);
 						a2->floorz = sec->floorz;
@@ -4745,7 +4745,7 @@ void handle_se31(DDukeActor* actor, bool choosedir)
 					if (a2->isPlayer() && a2->GetOwner())
 						if (ps[a2->PlayerIndex()].on_ground == 1)
 							ps[a2->PlayerIndex()].player_add_int_z(-l);
-					if (a2->int_zvel() == 0 && a2->spr.statnum != STAT_EFFECTOR && (!choosedir || a2->spr.statnum != STAT_PROJECTILE))
+					if (a2->float_zvel() == 0 && a2->spr.statnum != STAT_EFFECTOR && (!choosedir || a2->spr.statnum != STAT_PROJECTILE))
 					{
 						a2->add_int_z(-l);
 						a2->floorz = sec->floorz;
diff --git a/source/games/duke/src/actors_d.cpp b/source/games/duke/src/actors_d.cpp
index e42831977..d117badaf 100644
--- a/source/games/duke/src/actors_d.cpp
+++ b/source/games/duke/src/actors_d.cpp
@@ -473,7 +473,7 @@ int movesprite_ex_d(DDukeActor* actor, int xchange, int ychange, int zchange, un
 			((actor->actorstayput != nullptr && actor->actorstayput != dasectp) ||
 			 ((actor->spr.picnum == BOSS2) && actor->spr.pal == 0 && dasectp->lotag != 3) ||
 			 ((actor->spr.picnum == BOSS1 || actor->spr.picnum == BOSS2) && dasectp->lotag == ST_1_ABOVE_WATER) ||
-			 (dasectp->lotag == ST_1_ABOVE_WATER && (actor->spr.picnum == LIZMAN || (actor->spr.picnum == LIZTROOP && actor->int_zvel() == 0)))
+			 (dasectp->lotag == ST_1_ABOVE_WATER && (actor->spr.picnum == LIZMAN || (actor->spr.picnum == LIZTROOP && actor->float_zvel() == 0)))
 			))
 		 )
 		{
@@ -775,7 +775,7 @@ void movefallers_d(void)
 					act->add_int_zvel( x);
 					if (act->float_zvel() > 24)
 						act->set_int_zvel(6144);
-					act->add_int_z(act->int_zvel());
+					act->spr.pos.Z += act->float_zvel();
 				}
 				if ((sectp->floorz - act->spr.pos.Z) < 16)
 				{
@@ -2602,7 +2602,7 @@ static void heavyhbomb(DDukeActor *actor)
 		MulScale(actor->spr.xvel, bsin(actor->int_ang()), 14),
 		actor->int_zvel(), CLIPMASK0, coll);
 
-	if (actor->sector()->lotag == 1 && actor->int_zvel() == 0)
+	if (actor->sector()->lotag == 1 && actor->float_zvel() == 0)
 	{
 		actor->spr.pos.Z += 32;
 		if (actor->temp_data[5] == 0)
@@ -2676,7 +2676,7 @@ DETONATEB:
 
 			fi.hitradius(actor, m, x >> 2, x >> 1, x - (x >> 2), x);
 			spawn(actor, EXPLOSION2);
-			if (actor->int_zvel() == 0)	spawn(actor, EXPLOSION2BOT);
+			if (actor->float_zvel() == 0)	spawn(actor, EXPLOSION2BOT);
 			S_PlayActorSound(PIPEBOMB_EXPLODE, actor);
 			for (x = 0; x < 8; x++)
 				RANDOMSCRAP(actor);
@@ -2836,7 +2836,7 @@ void moveactors_d(void)
 		case HELECOPT:
 		case DUKECAR:
 
-			act->add_int_z(act->int_zvel());
+			act->spr.pos.Z += act->float_zvel();
 			act->temp_data[0]++;
 
 			if (act->temp_data[0] == 4) S_PlayActorSound(WAR_AMBIENCE2, act);
diff --git a/source/games/duke/src/actors_r.cpp b/source/games/duke/src/actors_r.cpp
index 323386d45..0129fbf0b 100644
--- a/source/games/duke/src/actors_r.cpp
+++ b/source/games/duke/src/actors_r.cpp
@@ -693,7 +693,7 @@ void movefallers_r(void)
 					act->add_int_zvel( x);
 					if (act->float_zvel() > 24)
 						act->set_int_zvel(6144);
-					act->add_int_z(act->int_zvel());
+					act->spr.pos.Z += act->float_zvel();
 				}
 				if ((sectp->floorz - act->spr.pos.Z) < 16)
 				{
@@ -2379,7 +2379,7 @@ static void heavyhbomb(DDukeActor *actor)
 		MulScale(actor->spr.xvel, bsin(actor->int_ang()), 14),
 		actor->int_zvel(), CLIPMASK0, coll);
 
-	if (actor->sector()->lotag == 1 && actor->int_zvel() == 0)
+	if (actor->sector()->lotag == 1 && actor->float_zvel() == 0)
 	{
 		actor->spr.pos.Z += 32;
 		if (actor->temp_data[5] == 0)
@@ -3633,7 +3633,7 @@ void move_r(DDukeActor *actor, int pnum, int xvel)
 
 	a = badguy(actor);
 
-	if (actor->spr.xvel || actor->int_zvel())
+	if (actor->spr.xvel || actor->float_zvel() != 0)
 	{
 		if (a)
 		{
diff --git a/source/games/exhumed/src/bubbles.cpp b/source/games/exhumed/src/bubbles.cpp
index 8dd78d082..1b1b91db9 100644
--- a/source/games/exhumed/src/bubbles.cpp
+++ b/source/games/exhumed/src/bubbles.cpp
@@ -87,7 +87,7 @@ void AIBubble::Tick(RunListEvent* ev)
         pActor->nFrame = 0;
     }
 
-    pActor->add_int_z(pActor->int_zvel());
+    pActor->spr.pos.Z = pActor->float_zvel();
 
     auto pSector = pActor->sector();
 
diff --git a/source/games/exhumed/src/items.cpp b/source/games/exhumed/src/items.cpp
index 50f6dba58..c07188b5b 100644
--- a/source/games/exhumed/src/items.cpp
+++ b/source/games/exhumed/src/items.cpp
@@ -422,8 +422,8 @@ void DoRegenerates()
         pActor->spr.yrepeat = (uint8_t)pActor->spr.xvel;
         pActor->spr.xrepeat = (uint8_t)pActor->spr.xvel;
         pActor->spr.pal  = (uint8_t)pActor->spr.yvel;
-        pActor->spr.yvel = pActor->int_zvel(); // setting to 0
-        pActor->spr.xvel = pActor->int_zvel(); // setting to 0
+        pActor->spr.yvel = 0;
+        pActor->spr.xvel = 0;
 
         if (pActor->spr.statnum == kStatExplodeTrigger) {
             pActor->spr.cstat = CSTAT_SPRITE_BLOCK_ALL;
diff --git a/source/games/exhumed/src/queen.cpp b/source/games/exhumed/src/queen.cpp
index d635bee40..ec4fe0694 100644
--- a/source/games/exhumed/src/queen.cpp
+++ b/source/games/exhumed/src/queen.cpp
@@ -819,7 +819,7 @@ void AIQueenHead::Tick(RunListEvent* ev)
                 pActor->spr.xvel = 0;
                 pActor->spr.yvel = 0;
 
-                if (pActor->int_zvel() == 0)
+                if (pActor->float_zvel() == 0)
                 {
                     QueenHead.nIndex = 120;
                 }
diff --git a/source/games/exhumed/src/rat.cpp b/source/games/exhumed/src/rat.cpp
index 55958b209..4ec7f658a 100644
--- a/source/games/exhumed/src/rat.cpp
+++ b/source/games/exhumed/src/rat.cpp
@@ -305,7 +305,7 @@ void AIRat::Tick(RunListEvent* ev)
     }
     case 2:
     {
-        if (pActor->spr.xvel || pActor->spr.yvel || pActor->int_zvel()) {
+        if (pActor->spr.xvel || pActor->spr.yvel || pActor->float_zvel() != 0) {
             MoveCreature(pActor);
         }
 
diff --git a/source/games/exhumed/src/wasp.cpp b/source/games/exhumed/src/wasp.cpp
index 29c3c3dc2..b85b674b2 100644
--- a/source/games/exhumed/src/wasp.cpp
+++ b/source/games/exhumed/src/wasp.cpp
@@ -333,9 +333,9 @@ void AIWasp::Tick(RunListEvent* ev)
     {
         auto pSector =pActor->sector();
 
-        pActor->add_int_z(pActor->int_zvel());
+        pActor->spr.pos.Z = pActor->float_zvel();
 
-        if (pActor->int_pos().Z >= pSector->int_floorz())
+        if (pActor->spr.pos.Z >= pSector->floorz)
         {
             if (pSector->pBelow != nullptr)
             {
diff --git a/source/games/sw/src/track.cpp b/source/games/sw/src/track.cpp
index 1ddc461fa..4e9cbabcd 100644
--- a/source/games/sw/src/track.cpp
+++ b/source/games/sw/src/track.cpp
@@ -3490,8 +3490,8 @@ int ActorFollowTrack(DSWActor* actor, short locktics)
 			vec.XY() = actor->spr.angle.ToVector() * actor->spr.xvel * inttoworld;
         }
 
-        if (actor->int_zvel())
-            vec.Z = actor->int_zvel() * locktics * zinttoworld;
+        if (actor->float_zvel() != 0)
+            vec.Z = actor->float_zvel() * locktics;
     }
 
     actor->user.coll = move_sprite(actor, vec, actor->user.ceiling_dist, actor->user.floor_dist, 0, locktics);
diff --git a/source/games/sw/src/weapon.cpp b/source/games/sw/src/weapon.cpp
index c96422ec9..bcc7c7a6c 100644
--- a/source/games/sw/src/weapon.cpp
+++ b/source/games/sw/src/weapon.cpp
@@ -16227,7 +16227,7 @@ int InitEnemyFireball(DSWActor* actor)
             if (dist != 0)
             {
                 actorNew->set_int_zvel((GORO_FIREBALL_VELOCITY * (targ_z - actorNew->int_pos().Z)) / dist);
-                actorNew->user.set_int_change_z(actorNew->int_zvel());
+                actorNew->user.change.Z = actorNew->float_zvel();
             }
             // back up first one
             lastvel = actorNew->int_zvel();