diff --git a/src/g_game.cpp.bak b/src/g_game.cpp
index 7f6305c..bd97987 100644
--- a/src/g_game.cpp.bak
+++ b/src/g_game.cpp
@@ -199,8 +199,6 @@ fixed_t 		angleturn[4] = {640, 1280, 320, 320};		// + slow turn
 fixed_t			flyspeed[2] = {1*256, 3*256};
 int				lookspeed[2] = {450, 512};
 
-#define SLOWTURNTICS	6 
-
 CVAR (Bool,		cl_run,			false,	CVAR_GLOBALCONFIG|CVAR_ARCHIVE)		// Always run?
 CVAR (Bool,		invertmouse,	false,	CVAR_GLOBALCONFIG|CVAR_ARCHIVE)		// Invert mouse look down/up?
 CVAR (Bool,		freelook,		false,	CVAR_GLOBALCONFIG|CVAR_ARCHIVE)		// Always mlook?
@@ -289,6 +287,14 @@ CCMD (turnspeeds)
 	}
 }
 
+CUSTOM_CVAR (Int, slowturntics, 6, 0)
+{
+	if (self < 0)
+		self = 0;
+	if (self > 350)
+		self = 350;
+}
+
 CCMD (slot)
 {
 	if (argv.argc() > 1)
@@ -568,18 +574,27 @@ void G_BuildTiccmd (ticcmd_t *cmd)
 	else
 	{
 		int tspeed = speed;
+		int angle = angleturn[tspeed];
+
+		if (turnheld < slowturntics)
+		{
+			int fast = angleturn[tspeed];
+			int slow = angleturn[tspeed + 2];
+			int turnheld2 = turnheld * turnheld;
+			int slowturntics3 = slowturntics * slowturntics * slowturntics;
+			// use smoothstep to interpolate between speeds
+			angle = 3 * turnheld2 * slowturntics - 2 * turnheld2 * turnheld;
+			angle = (angle * (fast - slow)) / slowturntics3 + slow;
+		}
 
-		if (turnheld < SLOWTURNTICS)
-			tspeed += 2;		// slow turn
-		
 		if (Button_Right.bDown)
 		{
-			G_AddViewAngle (angleturn[tspeed]);
+			G_AddViewAngle (angle);
 			LocalKeyboardTurner = true;
 		}
 		if (Button_Left.bDown)
 		{
-			G_AddViewAngle (-angleturn[tspeed]);
+			G_AddViewAngle (-angle);
 			LocalKeyboardTurner = true;
 		}
 	}