diff --git a/Runtime/Procedural/Mesh/MeshGeometry.cs b/Runtime/Procedural/Mesh/MeshGeometry.cs
index 1036f89..61be192 100644
--- a/Runtime/Procedural/Mesh/MeshGeometry.cs
+++ b/Runtime/Procedural/Mesh/MeshGeometry.cs
@@ -496,7 +496,7 @@ namespace Rokojori
       for ( int i = 0; i < normals.Count; i++ )
       {
         var yPositionAmount = MathX.RemapClamped( vertices[ i ].Y, startY, endY, 0, 1 );
-        var blendAmount = curve.Sample( yPositionAmount ) * amount; 
+        var blendAmount = ( curve == null ? 1f : curve.Sample( yPositionAmount ) ) * amount; 
         blendAmount = MathX.Clamp01( blendAmount );
         normals[ i ] = Math3D.BlendNormals( normals[ i ], direction, blendAmount );
       }