diff --git a/docs/lib3x-arc_path.md b/docs/lib3x-arc_path.md
index 9eadcf91..d63a9eb9 100644
--- a/docs/lib3x-arc_path.md
+++ b/docs/lib3x-arc_path.md
@@ -11,21 +11,21 @@ Creates an arc path. You can pass a 2 element vector to define the central angle
 
 ## Examples
   
-    use <arc_path.scad>;
-    use <hull_polyline2d.scad>;
-    
-    $fn = 24;
-    points = arc_path(radius = 20, angle = [45, 290]);
-    hull_polyline2d(points, width = 2);
+	use <arc_path.scad>;
+	use <polyline_join.scad>;
+
+	$fn = 24;
+	points = arc_path(radius = 20, angle = [45, 290]);
+	polyline_join(points) circle(1);
 
 ![arc_path](images/lib3x-arc_path-1.JPG)
 
     use <arc_path.scad>;
-    use <hull_polyline2d.scad>;
+    use <polyline_join.scad>;
     
     $fn = 24;
     points = arc_path(radius = 20, angle = 135);
-    hull_polyline2d(points, width = 2);
+    polyline_join(points) circle(1);
 
 ![arc_path](images/lib3x-arc_path-2.JPG)
 
diff --git a/docs/lib3x-bauer_spiral.md b/docs/lib3x-bauer_spiral.md
index 475ee717..c380cae6 100644
--- a/docs/lib3x-bauer_spiral.md
+++ b/docs/lib3x-bauer_spiral.md
@@ -15,7 +15,7 @@ Creates visually even spacing of n points on the surface of the sphere. Successi
 ## Examples
 
     use <bauer_spiral.scad>;
-    use <hull_polyline3d.scad>;
+    use <polyline_join.scad>;
 
     n = 200;
     radius = 20;
@@ -26,7 +26,7 @@ Creates visually even spacing of n points on the surface of the sphere. Successi
             sphere(1, $fn = 24);
     }
 
-    hull_polyline3d(pts, 1);
+    polyline_join(pts) sphere(.5);
 
 ![bauer_spiral](images/lib3x-bauer_spiral-1.JPG)
 
diff --git a/docs/lib3x-bezier_smooth.md b/docs/lib3x-bezier_smooth.md
index a7cca394..ff6578f4 100644
--- a/docs/lib3x-bezier_smooth.md
+++ b/docs/lib3x-bezier_smooth.md
@@ -12,7 +12,7 @@ Given a path, the `bezier_smooth` function uses bazier curves to smooth all corn
 
 ## Examples
 
-	use <hull_polyline3d.scad>;
+	use <polyline_join.scad>;
 	use <bezier_smooth.scad>;
 
 	width = 2;
@@ -25,15 +25,15 @@ Given a path, the `bezier_smooth` function uses bazier curves to smooth all corn
 		[-10, -10, 50]
 	];
 
-	hull_polyline3d(
-		path_pts, width
-	);
+	polyline_join(path_pts)
+	    sphere(width / 2);
 
 	smoothed_path_pts = bezier_smooth(path_pts, round_d);
 
-	color("red") translate([30, 0, 0]) hull_polyline3d(
-		smoothed_path_pts, width
-	);
+	color("red") 
+	translate([30, 0, 0]) 
+	polyline_join(smoothed_path_pts) 
+	    sphere(width / 2);
 
 ![bezier_smooth](images/lib3x-bezier_smooth-1.JPG)
 
diff --git a/docs/lib3x-bspline_curve.md b/docs/lib3x-bspline_curve.md
index 6ce4d68d..c001745c 100644
--- a/docs/lib3x-bspline_curve.md
+++ b/docs/lib3x-bspline_curve.md
@@ -1,6 +1,6 @@
 # bspline_curve
 
-[B-spline](https://en.wikipedia.org/wiki/B-spline) interpolation using [de Boor's algorithm](https://en.wikipedia.org/wiki/De_Boor%27s_algorithm). This function returns points of the B-spline path. Combined with the `polyline`, `polyline3d` or `hull_polyline3d` module, you can create a B-spline curve.
+[B-spline](https://en.wikipedia.org/wiki/B-spline) interpolation using [de Boor's algorithm](https://en.wikipedia.org/wiki/De_Boor%27s_algorithm). This function returns points of the B-spline path. 
 
 **Since:** 2.1
 
diff --git a/docs/lib3x-contours.md b/docs/lib3x-contours.md
index 00d0772f..1638519c 100644
--- a/docs/lib3x-contours.md
+++ b/docs/lib3x-contours.md
@@ -11,7 +11,7 @@ Computes contour polygons by applying [marching squares](https://en.wikipedia.or
 
 ## Examples
 
-    use <hull_polyline2d.scad>;
+    use <polyline_join.scad>;
 	use <surface/sf_thicken.scad>;
     use <contours.scad>;
 
@@ -36,7 +36,8 @@ Computes contour polygons by applying [marching squares](https://en.wikipedia.or
         translate([0, 0, z])
         linear_extrude(1)
         for(isoline = contours(points, z)) {
-            hull_polyline2d(isoline, width = 1);
+            polyline_join(isoline)
+			    circle(.5);
         }    
     }
 
diff --git a/docs/lib3x-curve.md b/docs/lib3x-curve.md
index 89f8cdf3..0b524e68 100644
--- a/docs/lib3x-curve.md
+++ b/docs/lib3x-curve.md
@@ -17,7 +17,7 @@ Draws a curved line from control points. The curve is drawn only from the 2nd co
 ## Examples
 
 	use <curve.scad>;
-	use <hull_polyline3d.scad>;
+	use <polyline_join.scad>;
 
 	pts = [
 		[28, 2, 1],
@@ -32,12 +32,14 @@ Draws a curved line from control points. The curve is drawn only from the 2nd co
 	tightness = 0;
 	points = curve(t_step, pts, tightness);
 
-	hull_polyline3d(points, 1);   
+	polyline_join(points)
+	    sphere(.5);   
 
 	#for(pt = pts) {
 		translate(pt)
 			sphere(1);
 	}
-	#hull_polyline3d(pts, .1);  
+	#polyline_join(pts)
+	    sphere(.05);  
 
 ![curve](images/lib3x-curve-3.JPG)
\ No newline at end of file
diff --git a/docs/lib3x-fibonacci_lattice.md b/docs/lib3x-fibonacci_lattice.md
index c3bf55e4..f6044c46 100644
--- a/docs/lib3x-fibonacci_lattice.md
+++ b/docs/lib3x-fibonacci_lattice.md
@@ -31,7 +31,7 @@ Creates visually even spacing of n points on the surface of the sphere. Nearest-
 ![fibonacci_lattice](images/lib3x-fibonacci_lattice-1.JPG)
 
     use <fibonacci_lattice.scad>;
-    use <hull_polyline3d.scad>;
+    use <polyline_join.scad>;
 
     n = 200;
     radius = 20;
@@ -49,7 +49,8 @@ Creates visually even spacing of n points on the surface of the sphere. Nearest-
     ];
 
     for(spiral = spirals) {
-        hull_polyline3d(spiral, 1);	
+        polyline_join(spiral)
+		    sphere(.5);	
     }
         
 ![fibonacci_lattice](images/lib3x-fibonacci_lattice-2.JPG)
\ No newline at end of file
diff --git a/docs/lib3x-footprints2.md b/docs/lib3x-footprints2.md
index a8ec826a..3272d700 100644
--- a/docs/lib3x-footprints2.md
+++ b/docs/lib3x-footprints2.md
@@ -11,7 +11,7 @@ Drive a turtle with `["forward", length]` or `["turn", angle]`. This function is
 
 ## Examples
 	    
-	use <polyline2d.scad>;
+	use <polyline_join.scad>;
 	use <turtle/footprints2.scad>;
 	
 	function arc_cmds(radius, angle, steps) = 
@@ -48,7 +48,8 @@ Drive a turtle with `["forward", length]` or `["turn", angle]`. This function is
 		)
 	);
 
-	polyline2d(poly, width = 1);
+	polyline_join(poly)
+	    circle(.5);
 
 ![footprints2](images/lib3x-footprints2-1.JPG)
 
diff --git a/docs/lib3x-footprints3.md b/docs/lib3x-footprints3.md
index f5117fe3..c950e6fe 100644
--- a/docs/lib3x-footprints3.md
+++ b/docs/lib3x-footprints3.md
@@ -11,7 +11,7 @@ A 3D verion of [footprint2](https://openhome.cc/eGossip/OpenSCAD/lib3x-footprint
 
 ## Examples
 	    
-	use <hull_polyline3d.scad>;
+	use <polyline_join.scad>;
 	use <turtle/footprints3.scad>;
 	
 	function xy_arc_cmds(radius, angle, steps) = 
@@ -49,7 +49,8 @@ A 3D verion of [footprint2](https://openhome.cc/eGossip/OpenSCAD/lib3x-footprint
 		)
 	);
 
-	hull_polyline3d(poly, thickness = 1);
+	polyline_join(poly)
+	    sphere(.5);
 
 ![footprints3](images/lib3x-footprints3-1.JPG)
 
diff --git a/docs/lib3x-helix.md b/docs/lib3x-helix.md
index 031fab98..31076113 100644
--- a/docs/lib3x-helix.md
+++ b/docs/lib3x-helix.md
@@ -14,7 +14,7 @@ Gets all points on the path of a spiral around a cylinder. Its `$fa`, `$fs` and
 ## Examples
     
 	use <helix.scad>;
-	use <hull_polyline3d.scad>;
+	use <polyline_join.scad>;
 	
 	$fn = 12;
 	
@@ -30,12 +30,13 @@ Gets all points on the path of a spiral around a cylinder. Its `$fa`, `$fs` and
 	    translate(p) sphere(5);
 	}
 	
-	hull_polyline3d(points, 2);
+	polyline_join(points)
+	    sphere(1);
 
 ![helix](images/lib3x-helix-1.JPG)
 
 	use <helix.scad>;
-	use <hull_polyline3d.scad>;
+	use <polyline_join.scad>;
 
 	$fn = 12;
 
@@ -47,7 +48,8 @@ Gets all points on the path of a spiral around a cylinder. Its `$fa`, `$fs` and
 		rt_dir = "CLK"
 	);
 
-	hull_polyline3d(points, 2);
+	polyline_join(points)
+	    sphere(1);
 
 	%cylinder(h = 100, r1 = 40, r2 = 20);