diff --git a/Runtime/SplinePlus.cs b/Runtime/SplinePlus.cs
index 4c19500..e53edc6 100644
--- a/Runtime/SplinePlus.cs
+++ b/Runtime/SplinePlus.cs
@@ -82,18 +82,18 @@ public class SplinePlus : MonoBehaviour
     {
         int resolutionScale = Mathf.CeilToInt(splineContainer.Splines[splineIndex].GetLength()) * resolution;
 
-        position = EvaluatePoint(splineIndex, t, out float3 upVector);
+        position = EvaluatePoint(splineIndex, t);
 
         float t1 = Mathf.Clamp(t, 0, 1 - (1 / (float)resolutionScale));
 
-        Vector3 position0 = EvaluatePoint(splineIndex, t1, out _);
+        Vector3 position0 = EvaluatePoint(splineIndex, t1);
 
-        Vector3 position1 = EvaluatePoint(splineIndex, t1 + (1 / (float)resolutionScale), out _);
+        Vector3 position1 = EvaluatePoint(splineIndex, t1 + (1 / (float)resolutionScale));
 
         Vector3 difference = position1 - position0;
 
-        rotation = Vector3.Dot(difference, upVector) > 0
-            ? Quaternion.LookRotation(difference, upVector)
+        rotation = Vector3.Dot(difference, Vector3.up) > 0
+            ? Quaternion.LookRotation(difference, Vector3.up)
             : Quaternion.FromToRotation(Vector3.forward, difference);
     }
 
@@ -101,24 +101,24 @@ public class SplinePlus : MonoBehaviour
     {
         int resolutionScale = Mathf.CeilToInt(splineContainer.CalculateLength()) * resolution;
 
-        position = EvaluatePoint(t, out float3 upVector);
+        position = EvaluatePoint(t);
 
         float t1 = Mathf.Clamp(t, 0, 1 - (1 / (float)resolutionScale));
 
-        Vector3 position0 = EvaluatePoint(t1, out _);
+        Vector3 position0 = EvaluatePoint(t1);
 
-        Vector3 position1 = EvaluatePoint(t1 + (1 / (float)resolutionScale), out _);
+        Vector3 position1 = EvaluatePoint(t1 + (1 / (float)resolutionScale));
 
         Vector3 difference = position1 - position0;
 
-        rotation = Vector3.Dot(difference, upVector) > 0
-            ? Quaternion.LookRotation(difference, upVector)
+        rotation = Vector3.Dot(difference, Vector3.up) > 0
+            ? Quaternion.LookRotation(difference, Vector3.up)
             : Quaternion.FromToRotation(Vector3.forward, difference);
     }
 
-    Vector3 EvaluatePoint(int splineIndex, float t, out float3 upVector)
+    Vector3 EvaluatePoint(int splineIndex, float t)
     {
-        ScaledEvaluate(splineContainer, splineIndex, t, out float3 position, out _, out upVector);
+        ScaledEvaluate(splineContainer, splineIndex, t, out float3 position, out _, out _);
 
         ScaledEvaluate(deformContainer, 0, position.x / deformContainer.Spline.GetLength(), out float3 deformPosition, out float3 deformTangent, out float3 deformUpVector);
 
@@ -132,9 +132,9 @@ public class SplinePlus : MonoBehaviour
         return deformPosition + (deformMatrix.c0 * position.z) + (deformMatrix.c1 * position.y);
     }
 
-    Vector3 EvaluatePoint(float t, out float3 upVector)
+    Vector3 EvaluatePoint(float t)
     {
-        splineContainer.Evaluate(t, out float3 position, out _, out upVector);
+        splineContainer.Evaluate(t, out float3 position, out _, out _);
 
         ScaledEvaluate(deformContainer, 0, position.x / deformContainer.Spline.GetLength(), out float3 deformPosition, out float3 deformTangent, out float3 deformUpVector);