diff --git a/source/core/gameinput.cpp b/source/core/gameinput.cpp
index 8701187e6..2e0888ff5 100644
--- a/source/core/gameinput.cpp
+++ b/source/core/gameinput.cpp
@@ -267,7 +267,7 @@ void PlayerAngles::applyYaw(float const avel, ESyncBits* actions, double const s
 //
 //---------------------------------------------------------------------------
 
-void PlayerAngles::doViewPitch(const DVector2& pos, DAngle const ang, bool const aimmode, bool const canslopetilt, sectortype* const cursectnum, double const scaleAdjust, bool const climbing)
+void PlayerAngles::doViewPitch(const DVector2& pos, DAngle const ang, bool const aimmode, bool const canslopetilt, sectortype* const cursectnum, bool const climbing)
 {
 	if (cl_slopetilting && cursectnum != nullptr)
 	{
@@ -292,7 +292,7 @@ void PlayerAngles::doViewPitch(const DVector2& pos, DAngle const ang, bool const
 				// accordingly
 				if (cursectnum == tempsect || (!isBlood() && abs(getflorzofslopeptr(tempsect, rotpt) - k) <= 4))
 				{
-					ViewAngles.Pitch -= maphoriz(scaleAdjust * ((j - k) * (!isBlood() ? 0.625 : 5.5)));
+					ViewAngles.Pitch -= maphoriz((j - k) * (!isBlood() ? 0.625 : 5.5));
 				}
 			}
 		}
@@ -300,12 +300,12 @@ void PlayerAngles::doViewPitch(const DVector2& pos, DAngle const ang, bool const
 		if (climbing)
 		{
 			// tilt when climbing but you can't even really tell it.
-			if (ViewAngles.Pitch > PITCH_HORIZOFFCLIMB) ViewAngles.Pitch += getscaledangle(PITCH_HORIZOFFSPEED, deltaangle(ViewAngles.Pitch, PITCH_HORIZOFFCLIMB), PITCH_HORIZOFFPUSH, scaleAdjust);
+			if (ViewAngles.Pitch > PITCH_HORIZOFFCLIMB) ViewAngles.Pitch += getscaledangle(PITCH_HORIZOFFSPEED, deltaangle(ViewAngles.Pitch, PITCH_HORIZOFFCLIMB), PITCH_HORIZOFFPUSH);
 		}
 		else
 		{
 			// Make horizoff grow towards 0 since horizoff is not modified when you're not on a slope.
-			scaletozero(ViewAngles.Pitch, PITCH_HORIZOFFSPEED, scaleAdjust, PITCH_HORIZOFFPUSH);
+			scaletozero(ViewAngles.Pitch, PITCH_HORIZOFFSPEED, 1, PITCH_HORIZOFFPUSH);
 		}
 
 		// Clamp off against the maximum allowed pitch.
diff --git a/source/core/gameinput.h b/source/core/gameinput.h
index deb02b581..8ec51d95f 100644
--- a/source/core/gameinput.h
+++ b/source/core/gameinput.h
@@ -27,7 +27,7 @@ struct PlayerAngles
 	void applyYaw(float const avel, ESyncBits* actions, double const scaleAdjust = 1);
 
 	// Prototypes for applying view.
-	void doViewPitch(const DVector2& pos, DAngle const ang, bool const aimmode, bool const canslopetilt, sectortype* const cursectnum, double const scaleAdjust = 1, bool const climbing = false);
+	void doViewPitch(const DVector2& pos, DAngle const ang, bool const aimmode, bool const canslopetilt, sectortype* const cursectnum, bool const climbing = false);
 	void doViewYaw(const ESyncBits actions);
 
 	// General methods.
@@ -101,9 +101,8 @@ struct PlayerAngles
 
 
 	// Legacy, to be removed.
-	DAngle horizOLDSUM() { return ZzOLDHORIZON() + PrevViewAngles.Pitch; }
-	DAngle horizSUM() { return ZzHORIZON() + ViewAngles.Pitch; }
-	DAngle horizLERPSUM(double const interpfrac) { return interpolatedvalue(horizOLDSUM(), horizSUM(), interpfrac); }
+	DAngle horizSUM(const double interpfrac = 1) { return ZzHORIZON() + interpolatedvalue(PrevViewAngles.Pitch, ViewAngles.Pitch, interpfrac); }
+	DAngle horizLERPSUM(double const interpfrac) { return interpolatedvalue(ZzOLDHORIZON() + PrevViewAngles.Pitch, ZzHORIZON() + ViewAngles.Pitch, interpfrac); }
 	DAngle angSUM(const double interpfrac) { return ZzANGLE() + angLERPLOOKANG(interpfrac); }
 	DAngle angLERPSUM(double const interpfrac) { return interpolatedvalue(ZzOLDANGLE() + PrevViewAngles.Yaw, ZzANGLE() + ViewAngles.Yaw, interpfrac); }
 	DAngle angLERPANG(double const interpfrac) { return interpolatedvalue(ZzOLDANGLE(), ZzANGLE(), interpfrac); }
diff --git a/source/games/blood/src/controls.cpp b/source/games/blood/src/controls.cpp
index b2ec66c20..1b404fd80 100644
--- a/source/games/blood/src/controls.cpp
+++ b/source/games/blood/src/controls.cpp
@@ -34,8 +34,6 @@ BEGIN_BLD_NS
 
 static InputPacket gInput;
 
-void doslopetilting(PLAYER* pPlayer, double const scaleAdjust);
-
 //---------------------------------------------------------------------------
 //
 //
@@ -63,7 +61,6 @@ void GameInterface::GetInput(ControlInfo* const hidInput, double const scaleAdju
 		{
 			pPlayer->Angles.applyYaw(input.avel, &pPlayer->input.actions, scaleAdjust);
 			pPlayer->Angles.applyPitch(input.horz, &pPlayer->input.actions, scaleAdjust);
-			doslopetilting(pPlayer, scaleAdjust);
 		}
 
 		pPlayer->Angles.applyScaledAdjustments(scaleAdjust);
diff --git a/source/games/blood/src/player.cpp b/source/games/blood/src/player.cpp
index 41f7e8c63..06c4e8f85 100644
--- a/source/games/blood/src/player.cpp
+++ b/source/games/blood/src/player.cpp
@@ -1498,12 +1498,12 @@ int ActionScan(PLAYER* pPlayer, HitInfo* out)
 //
 //---------------------------------------------------------------------------
 
-void doslopetilting(PLAYER* pPlayer, double const scaleAdjust = 1)
+void doslopetilting(PLAYER* pPlayer)
 {
 	auto plActor = pPlayer->actor;
 	int const florhit = pPlayer->actor->hit.florhit.type;
 	bool const va = plActor->xspr.height < 16 && (florhit == kHitSector || florhit == 0) ? 1 : 0;
-	pPlayer->Angles.doViewPitch(plActor->spr.pos.XY(), plActor->spr.Angles.Yaw, va, plActor->sector()->floorstat & CSTAT_SECTOR_SLOPE, plActor->sector(), scaleAdjust);
+	pPlayer->Angles.doViewPitch(plActor->spr.pos.XY(), plActor->spr.Angles.Yaw, va, plActor->sector()->floorstat & CSTAT_SECTOR_SLOPE, plActor->sector());
 }
 
 //---------------------------------------------------------------------------
@@ -1715,9 +1715,10 @@ void ProcessInput(PLAYER* pPlayer)
 	if (SyncInput())
 	{
 		pPlayer->Angles.applyPitch(pInput->horz, &pInput->actions);
-		doslopetilting(pPlayer);
 	}
 
+	doslopetilting(pPlayer);
+
 	pPlayer->Angles.unlockYaw();
 	pPlayer->Angles.unlockPitch();
 
diff --git a/source/games/blood/src/view.cpp b/source/games/blood/src/view.cpp
index 4a3a914f2..968a5440d 100644
--- a/source/games/blood/src/view.cpp
+++ b/source/games/blood/src/view.cpp
@@ -502,7 +502,7 @@ static void SetupView(PLAYER* pPlayer, DVector3& cPos, DAngle& cA, DAngle& cH, s
 		if (!SyncInput())
 		{
 			cA = pPlayer->Angles.angSUM(interpfrac);
-			cH = pPlayer->Angles.horizSUM();
+			cH = pPlayer->Angles.horizSUM(interpfrac);
 		}
 		else
 		{
diff --git a/source/games/duke/src/hudweapon_d.cpp b/source/games/duke/src/hudweapon_d.cpp
index 0bc7ae1c7..1088f5fcd 100644
--- a/source/games/duke/src/hudweapon_d.cpp
+++ b/source/games/duke/src/hudweapon_d.cpp
@@ -229,7 +229,7 @@ void displayweapon_d(int snum, double interpfrac)
 	gun_pos -= fabs(p->GetActor()->spr.scale.X < 0.5 ? BobVal(weapon_sway * 4.) * 32 : BobVal(weapon_sway * 0.5) * 16) + hard_landing;
 
 	auto offsets = p->Angles.angWEAPONOFFSETS(interpfrac);
-	auto horiz = !SyncInput() ? p->Angles.horizSUM() : p->Angles.horizLERPSUM(interpfrac);
+	auto horiz = !SyncInput() ? p->Angles.horizSUM(interpfrac) : p->Angles.horizLERPSUM(interpfrac);
 	auto pitchoffset = interpolatedvalue(0., 16., horiz / DAngle90);
 	auto yawinput = getavel(snum) * (1. / 16.);
 	auto angle = -p->Angles.angLERPROTSCRN(interpfrac);
diff --git a/source/games/duke/src/inlines.h b/source/games/duke/src/inlines.h
index 11af3ad00..dfb7aeef6 100644
--- a/source/games/duke/src/inlines.h
+++ b/source/games/duke/src/inlines.h
@@ -208,10 +208,10 @@ inline bool playrunning()
 	return (paused == 0 || (paused == 1 && (ud.recstat == 2 || ud.multimode > 1)));
 }
 
-inline void doslopetilting(player_struct* p, double const scaleAdjust = 1)
+inline void doslopetilting(player_struct* p)
 {
 	bool const canslopetilt = p->on_ground && p->insector() && p->cursector->lotag != ST_2_UNDERWATER && (p->cursector->floorstat & CSTAT_SECTOR_SLOPE);
-	p->Angles.doViewPitch(p->GetActor()->spr.pos.XY(), p->Angles.ZzANGLE(), p->aim_mode == 0, canslopetilt, p->cursector, scaleAdjust);
+	p->Angles.doViewPitch(p->GetActor()->spr.pos.XY(), p->Angles.ZzANGLE(), p->aim_mode == 0, canslopetilt, p->cursector);
 }
 
 //---------------------------------------------------------------------------
diff --git a/source/games/duke/src/input.cpp b/source/games/duke/src/input.cpp
index 7b69002f3..18167bff5 100644
--- a/source/games/duke/src/input.cpp
+++ b/source/games/duke/src/input.cpp
@@ -835,7 +835,6 @@ void GameInterface::GetInput(ControlInfo* const hidInput, double const scaleAdju
 		if (p->GetActor()->spr.extra > 0)
 		{
 			// Do these in the same order as the old code.
-			doslopetilting(p, scaleAdjust);
 			p->Angles.applyYaw(p->adjustavel(input.avel), &p->sync.actions, scaleAdjust);
 			p->Angles.applyPitch(input.horz, &p->sync.actions, scaleAdjust);
 		}
diff --git a/source/games/duke/src/player_d.cpp b/source/games/duke/src/player_d.cpp
index 73ef5402a..c9d679d90 100644
--- a/source/games/duke/src/player_d.cpp
+++ b/source/games/duke/src/player_d.cpp
@@ -2761,10 +2761,7 @@ void processinput_d(int snum)
 	pact->floorz = floorz;
 	pact->ceilingz = ceilingz;
 
-	if (SyncInput())
-	{
-		doslopetilting(p);
-	}
+	doslopetilting(p);
 
 	if (chz.type == kHitSprite)
 	{
diff --git a/source/games/duke/src/player_r.cpp b/source/games/duke/src/player_r.cpp
index a0f4c3557..db1c25bca 100644
--- a/source/games/duke/src/player_r.cpp
+++ b/source/games/duke/src/player_r.cpp
@@ -3347,10 +3347,7 @@ void processinput_r(int snum)
 	pact->floorz = floorz;
 	pact->ceilingz = ceilingz;
 
-	if (SyncInput())
-	{
-		doslopetilting(p);
-	}
+	doslopetilting(p);
 
 	if (chz.type == kHitSprite)
 	{
diff --git a/source/games/duke/src/render.cpp b/source/games/duke/src/render.cpp
index c37576170..ec7b0bf08 100644
--- a/source/games/duke/src/render.cpp
+++ b/source/games/duke/src/render.cpp
@@ -305,7 +305,7 @@ void displayrooms(int snum, double interpfrac, bool sceneonly)
 			{
 				// This is for real time updating of the view direction.
 				cang = p->Angles.angSUM(interpfrac);
-				choriz = p->Angles.horizSUM();
+				choriz = p->Angles.horizSUM(interpfrac);
 			}
 		}
 
diff --git a/source/games/exhumed/src/view.cpp b/source/games/exhumed/src/view.cpp
index 7d50615f1..29d98cb0d 100644
--- a/source/games/exhumed/src/view.cpp
+++ b/source/games/exhumed/src/view.cpp
@@ -234,7 +234,7 @@ void DrawView(double interpfrac, bool sceneonly)
 
         if (!SyncInput())
         {
-            nCamerapan = PlayerList[nLocalPlayer].Angles.horizSUM();
+            nCamerapan = PlayerList[nLocalPlayer].Angles.horizSUM(interpfrac);
             nCameraang = PlayerList[nLocalPlayer].Angles.angSUM(interpfrac);
         }
         else
diff --git a/source/games/sw/src/draw.cpp b/source/games/sw/src/draw.cpp
index e8aa0d376..7ef5260f1 100644
--- a/source/games/sw/src/draw.cpp
+++ b/source/games/sw/src/draw.cpp
@@ -1250,7 +1250,7 @@ void drawscreen(PLAYER* pp, double interpfrac, bool sceneonly)
     else
     {
         tang = pp->Angles.angSUM(interpfrac);
-        thoriz = pp->Angles.horizSUM();
+        thoriz = pp->Angles.horizSUM(interpfrac);
     }
     trotscrnang = camerapp->Angles.angLERPROTSCRN(interpfrac);
     tsect = camerapp->cursector;
diff --git a/source/games/sw/src/player.cpp b/source/games/sw/src/player.cpp
index 7313beff1..1b6e8cede 100644
--- a/source/games/sw/src/player.cpp
+++ b/source/games/sw/src/player.cpp
@@ -1667,10 +1667,20 @@ void SlipSlope(PLAYER* pp)
 //
 //---------------------------------------------------------------------------
 
-void DoPlayerHorizon(PLAYER* pp, float const horz, double const scaleAdjust)
+void DoPlayerSlopeTilting(PLAYER* pp)
 {
     bool const canslopetilt = !(pp->Flags & (PF_FLYING|PF_SWIMMING|PF_DIVING|PF_CLIMBING|PF_JUMPING|PF_FALLING)) && pp->cursector && (pp->cursector->floorstat & CSTAT_SECTOR_SLOPE);
-    pp->Angles.doViewPitch(pp->actor->spr.pos.XY(), pp->Angles.ZzANGLE(), pp->input.actions & SB_AIMMODE, canslopetilt, pp->cursector, scaleAdjust, (pp->Flags & PF_CLIMBING));
+    pp->Angles.doViewPitch(pp->actor->spr.pos.XY(), pp->Angles.ZzANGLE(), pp->input.actions & SB_AIMMODE, canslopetilt, pp->cursector, (pp->Flags & PF_CLIMBING));
+}
+
+//---------------------------------------------------------------------------
+//
+//
+//
+//---------------------------------------------------------------------------
+
+void DoPlayerHorizon(PLAYER* pp, float const horz, double const scaleAdjust)
+{
     pp->Angles.applyPitch(horz, &pp->input.actions, scaleAdjust);
 }
 
@@ -2202,6 +2212,8 @@ void DoPlayerMove(PLAYER* pp)
         DoPlayerHorizon(pp, pp->input.horz, 1);
     }
 
+    DoPlayerSlopeTilting(pp);
+
     if (pp->insector() && (pp->cursector->extra & SECTFX_DYNAMIC_AREA))
     {
         if (pp->Flags & (PF_FLYING|PF_JUMPING|PF_FALLING))
@@ -2776,6 +2788,8 @@ void DoPlayerMoveVehicle(PLAYER* pp)
         DoPlayerHorizon(pp, pp->input.horz, 1);
     }
 
+    DoPlayerSlopeTilting(pp);
+
     DoTankTreads(pp);
 }
 
@@ -2817,6 +2831,8 @@ void DoPlayerMoveTurret(PLAYER* pp)
     {
         DoPlayerHorizon(pp, pp->input.horz, 1);
     }
+
+    DoPlayerSlopeTilting(pp);
 }
 
 //---------------------------------------------------------------------------
@@ -3380,6 +3396,8 @@ void DoPlayerClimb(PLAYER* pp)
         DoPlayerHorizon(pp, pp->input.horz, 1);
     }
 
+    DoPlayerSlopeTilting(pp);
+
     if (FAF_ConnectArea(pp->cursector))
     {
         updatesectorz(pp->actor->getPosWithOffsetZ(), &pp->cursector);