diff --git a/source/games/duke/src/actors.cpp b/source/games/duke/src/actors.cpp
index 9d9be200c..dd960bfab 100644
--- a/source/games/duke/src/actors.cpp
+++ b/source/games/duke/src/actors.cpp
@@ -1365,7 +1365,7 @@ void rpgexplode(DDukeActor *actor, int hit, const DVector3 &pos, int EXPLOSION2,
 	}
 	else if (hit == kHitSector)
 	{
-		if (actor->int_zvel() > 0 && EXPLOSION2BOT >= 0)
+		if (actor->float_zvel() > 0 && EXPLOSION2BOT >= 0)
 			spawn(actor, EXPLOSION2BOT);
 		else
 		{
@@ -2220,7 +2220,7 @@ bool jibs(DDukeActor *actor, int JIBS6, bool timeout, bool callsetsprite, bool f
 		}
 
 		actor->add_int_pos({ MulScale(actor->spr.xvel, bcos(actor->int_ang()), 14), MulScale(actor->spr.xvel, bsin(actor->int_ang()), 14), 0 });
-		actor->add_int_z(actor->int_zvel());
+		actor->spr.pos.Z += actor->float_zvel();
 
 		if (floorcheck && actor->spr.pos.Z >= actor->sector()->floorz)
 		{
@@ -3357,7 +3357,7 @@ void handle_se05(DDukeActor* actor, int FIRELASER)
 		}
 	}
 
-	actor->add_int_z(actor->int_zvel());
+	actor->spr.pos.Z += actor->float_zvel();
 	sc->add_int_ceilingz(actor->int_zvel());
 	sector[actor->temp_data[0]].add_int_ceilingz(actor->int_zvel());
 	ms(actor);
@@ -4852,7 +4852,7 @@ void makeitfall(DDukeActor* actor)
 		if(actor->int_zvel() < 6144)
 			actor->add_int_zvel( c);
 		else actor->set_int_zvel(6144);
-		actor->add_int_z(actor->int_zvel());
+		actor->spr.pos.Z += actor->float_zvel();
 	}
 	if (actor->spr.pos.Z >= actor->floorz - FOURSLEIGHT_F)
 	{
@@ -5080,7 +5080,7 @@ void fall_common(DDukeActor *actor, int playernum, int JIBS6, int DRONE, int BLO
 		if (actor->spr.pos.Z < actor->floorz - FOURSLEIGHT_F)
 		{
 			actor->add_int_zvel( c);
-			actor->add_int_z(actor->int_zvel());
+			actor->spr.pos.Z += actor->float_zvel();
 
 			if (actor->int_zvel() > 6144) actor->set_int_zvel(6144);
 		}
diff --git a/source/games/duke/src/actors_d.cpp b/source/games/duke/src/actors_d.cpp
index 9111244fc..a66e379c3 100644
--- a/source/games/duke/src/actors_d.cpp
+++ b/source/games/duke/src/actors_d.cpp
@@ -1455,7 +1455,7 @@ static bool weaponhitsector(DDukeActor* proj, const DVector3& oldpos, bool fireb
 {
 	SetActor(proj, oldpos);
 
-	if (proj->int_zvel() < 0)
+	if (proj->float_zvel() < 0)
 	{
 		if (proj->sector()->ceilingstat & CSTAT_SECTOR_SKY)
 			if (proj->sector()->ceilingpal == 0)
@@ -1644,7 +1644,7 @@ static void weaponcommon_d(DDukeActor* proj)
 					spawned->spr.xrepeat = spawned->spr.yrepeat = proj->spr.xrepeat >> 1;
 					if (coll.type == kHitSector)
 					{
-						if (proj->int_zvel() < 0)
+						if (proj->float_zvel() < 0)
 						{
 							spawned->spr.cstat |= CSTAT_SPRITE_YFLIP; 
 							spawned->spr.pos.Z += 72;
@@ -2401,7 +2401,7 @@ static void greenslime(DDukeActor *actor)
 		if (actor->spr.xrepeat > 8) actor->spr.xrepeat -= 4;
 		if (actor->int_zvel() > -(2048 + 1024))
 			actor->add_int_zvel(- 348);
-		actor->add_int_z(actor->int_zvel());
+		actor->spr.pos.Z += actor->float_zvel();
 		if (actor->spr.pos.Z < actor->ceilingz + 16)
 		{
 			actor->spr.pos.Z = actor->ceilingz + 16;
@@ -2517,7 +2517,7 @@ static void flamethrowerflame(DDukeActor *actor)
 		else if (coll.type == kHitSector)
 		{
 			SetActor(actor, dapos);
-			if (actor->int_zvel() < 0)
+			if (actor->float_zvel() < 0)
 				fi.checkhitceiling(actor->sector());
 		}
 
@@ -3591,7 +3591,7 @@ void move_d(DDukeActor *actor, int playernum, int xvel)
 				}
 				else
 				{
-					if (actor->int_zvel() > 0)
+					if (actor->float_zvel() > 0)
 					{
 						double f = getflorzofslopeptrf(actor->sector(), actor->spr.pos.X, actor->spr.pos.Y);
 						actor->floorz = f;
@@ -3612,9 +3612,9 @@ void move_d(DDukeActor *actor, int playernum, int xvel)
 			}
 			else if (actor->spr.picnum != ORGANTIC)
 			{
-				if (actor->int_zvel() > 0 && actor->floorz < actor->spr.pos.Z)
+				if (actor->float_zvel() > 0 && actor->floorz < actor->spr.pos.Z)
 					actor->spr.pos.Z = actor->floorz;
-				if (actor->int_zvel() < 0)
+				if (actor->float_zvel() < 0)
 				{
 					double c = getceilzofslopeptrf(actor->sector(), actor->spr.pos.X, actor->spr.pos.Y);
 					if (actor->spr.pos.Z < c + 66)
diff --git a/source/games/duke/src/actors_r.cpp b/source/games/duke/src/actors_r.cpp
index 006d8b272..a535298c4 100644
--- a/source/games/duke/src/actors_r.cpp
+++ b/source/games/duke/src/actors_r.cpp
@@ -1135,7 +1135,7 @@ bool weaponhitsector(DDukeActor *proj, const DVector3& oldpos)
 		guts_r(proj, RABBITJIBC, 2, myconnectindex);
 	}
 
-	if (proj->int_zvel() < 0)
+	if (proj->float_zvel() < 0)
 	{
 		if (proj->sector()->ceilingstat & CSTAT_SECTOR_SKY)
 			if (proj->sector()->ceilingpal == 0)
@@ -1305,7 +1305,7 @@ static void weaponcommon_r(DDukeActor *proj)
 					spawned->spr.xrepeat = spawned->spr.yrepeat = proj->spr.xrepeat >> 1;
 					if (coll.type == kHitSector)
 					{
-						if (proj->int_zvel() < 0)
+						if (proj->float_zvel() < 0)
 						{
 							spawned->spr.cstat |= CSTAT_SPRITE_YFLIP;
 							spawned->spr.pos.Z += 72;
@@ -3639,7 +3639,7 @@ void move_r(DDukeActor *actor, int pnum, int xvel)
 		{
 			if (actor->spr.picnum == DRONE && actor->spr.extra > 0)
 			{
-				if (actor->int_zvel() > 0)
+				if (actor->float_zvel() > 0)
 				{
 					double dist = isRRRA() ? 28 : 30;
 					double f = getflorzofslopeptrf(actor->sector(), actor->spr.pos.X, actor->spr.pos.Y);
@@ -3658,9 +3658,9 @@ void move_r(DDukeActor *actor, int pnum, int xvel)
 					}
 				}
 			}
-			if (actor->int_zvel() > 0 && actor->floorz < actor->spr.pos.Z)
+			if (actor->float_zvel() > 0 && actor->floorz < actor->spr.pos.Z)
 				actor->spr.pos.Z = actor->floorz;
-			if (actor->int_zvel() < 0)
+			if (actor->float_zvel() < 0)
 			{
 				double c = getceilzofslopeptrf(actor->sector(), actor->spr.pos.X, actor->spr.pos.Y);
 				if (actor->spr.pos.Z < c + 66)
diff --git a/source/games/exhumed/src/move.cpp b/source/games/exhumed/src/move.cpp
index 63ef3ff54..20195dd49 100644
--- a/source/games/exhumed/src/move.cpp
+++ b/source/games/exhumed/src/move.cpp
@@ -585,17 +585,17 @@ void Gravity(DExhumedActor* pActor)
         }
         else
         {
-            if (pActor->int_zvel() > 0)
+            if (pActor->float_zvel() > 0)
             {
                 pActor->add_int_zvel(- 64);
-                if (pActor->int_zvel() < 0) {
+                if (pActor->float_zvel() < 0) {
                     pActor->clear_zvel();
                 }
             }
-            else if (pActor->int_zvel() < 0)
+            else if (pActor->float_zvel() < 0)
             {
                 pActor->add_int_zvel( 64);
-                if (pActor->int_zvel() > 0) {
+                if (pActor->float_zvel() > 0) {
                     pActor->clear_zvel();
                 }
             }
diff --git a/source/games/exhumed/src/spider.cpp b/source/games/exhumed/src/spider.cpp
index da0f4a8d5..3442e9402 100644
--- a/source/games/exhumed/src/spider.cpp
+++ b/source/games/exhumed/src/spider.cpp
@@ -281,7 +281,7 @@ void AISpider::Tick(RunListEvent* ev)
         return;
 
     if (nMov.exbits & kHitAux1
-        && spp->int_zvel() < 0
+        && spp->float_zvel() < 0
         && hiHit.type != kHitSprite
         && !((spp->sector()->ceilingstat) & CSTAT_SECTOR_SKY))
     {
diff --git a/source/games/sw/src/jweapon.cpp b/source/games/sw/src/jweapon.cpp
index aa039d9e6..0e1838a63 100644
--- a/source/games/sw/src/jweapon.cpp
+++ b/source/games/sw/src/jweapon.cpp
@@ -265,18 +265,18 @@ int DoWallBloodDrip(DSWActor* actor)
         if (actor->spr.pos.Z > actor->user.pos.Y && actor->spr.pos.Z < actor->user.pos.Z)
         {
             actor->add_int_zvel( 300);
-            actor->add_int_z(actor->int_zvel());
+            actor->spr.pos.Z += actor->float_zvel();
         }
         else
         {
             actor->set_int_zvel((300+RandomRange(2300)) >> 1);
-            actor->add_int_z(actor->int_zvel());
+            actor->spr.pos.Z += actor->float_zvel();
         }
     }
     else
     {
         actor->set_int_zvel((300+RandomRange(2300)) >> 1);
-        actor->add_int_z(actor->int_zvel());
+        actor->spr.pos.Z += actor->float_zvel();
     }
 
     if (actor->spr.pos.Z >= actor->user.loz)
@@ -1188,7 +1188,7 @@ int SpawnRadiationCloud(DSWActor* actor)
 int DoRadiationCloud(DSWActor* actor)
 {
 	actor->spr.pos.XY() += actor->user.change;
-    actor->add_int_z(-actor->int_zvel());
+    actor->spr.pos.Z -= actor->float_zvel();
 
     if (actor->user.ID)
     {
diff --git a/source/games/sw/src/weapon.cpp b/source/games/sw/src/weapon.cpp
index 6beefe7dd..50b96a1ca 100644
--- a/source/games/sw/src/weapon.cpp
+++ b/source/games/sw/src/weapon.cpp
@@ -16654,13 +16654,13 @@ DSWActor* SpawnBubble(DSWActor* actor)
 int DoVehicleSmoke(DSWActor* actor)
 {
 	actor->spr.pos.XY() += actor->user.change.XY();
-    actor->add_int_z(-actor->int_zvel());
+    actor->spr.pos.Z -= actor->float_zvel();
     return false;
 }
 
 int DoWaterSmoke(DSWActor* actor)
 {
-    actor->add_int_z(-actor->int_zvel());
+    actor->spr.pos.Z -= actor->float_zvel();
     return false;
 }
 
@@ -16718,7 +16718,7 @@ int SpawnSmokePuff(DSWActor* actor)
 
 int DoBubble(DSWActor* actor)
 {
-    actor->add_int_z(-actor->int_zvel());
+    actor->spr.pos.Z -= actor->float_zvel();
     actor->add_int_zvel( 32);
 
     if (actor->int_zvel() > 768)