diff --git a/README.md b/README.md
index f28f8cbe..6bb5a059 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,7 @@ These examples incubate dotSCAD and dotSCAD refactors these examples. See [examp
 - [crystal_ball](https://openhome.cc/eGossip/OpenSCAD/lib3x-crystal_ball.html)
 - [function_grapher](https://openhome.cc/eGossip/OpenSCAD/lib3x-function_grapher.html)
 - [hull_polyline3d](https://openhome.cc/eGossip/OpenSCAD/lib3x-hull_polyline3d.html)
-- [line3d](https://openhome.cc/eGossip/OpenSCAD/lib2x-line3d.html)
+- [line3d](https://openhome.cc/eGossip/OpenSCAD/lib3x-line3d.html)
 - [loft](https://openhome.cc/eGossip/OpenSCAD/lib2x-loft.html)
 - [polyhedron_hull](https://openhome.cc/eGossip/OpenSCAD/lib2x-polyhedron_hull.html)
 - [polyline3d](https://openhome.cc/eGossip/OpenSCAD/lib2x-polyline3d.html)
diff --git a/docs/images/lib2x-line3d-1.JPG b/docs/images/lib3x-line3d-1.JPG
similarity index 100%
rename from docs/images/lib2x-line3d-1.JPG
rename to docs/images/lib3x-line3d-1.JPG
diff --git a/docs/images/lib2x-line3d-2.JPG b/docs/images/lib3x-line3d-2.JPG
similarity index 100%
rename from docs/images/lib2x-line3d-2.JPG
rename to docs/images/lib3x-line3d-2.JPG
diff --git a/docs/images/lib2x-line3d-3.JPG b/docs/images/lib3x-line3d-3.JPG
similarity index 100%
rename from docs/images/lib2x-line3d-3.JPG
rename to docs/images/lib3x-line3d-3.JPG
diff --git a/docs/lib2x-line3d.md b/docs/lib3x-line3d.md
similarity index 85%
rename from docs/lib2x-line3d.md
rename to docs/lib3x-line3d.md
index cff01605..f4a6fd14 100644
--- a/docs/lib2x-line3d.md
+++ b/docs/lib3x-line3d.md
@@ -6,7 +6,7 @@ Creates a 3D line from two points.
 
 - `p1` : 3 element vector `[x, y, z]`.
 - `p2` : 3 element vector `[x, y, z]`.
-- `thickness` : The line thickness.
+- `diameter` : The line diameter. Default to 1.
 - `p1Style` : The end-cap style of the point `p1`. The value must be `"CAP_BUTT"`, `"CAP_CIRCLE"` or `"CAP_SPHERE"`. The default value is `"CAP_CIRCLE"`. 
 - `p2Style` : The end-cap style of the point `p2`. The value must be `"CAP_BUTT"`, `"CAP_CIRCLE"` or `"CAP_SPHERE"`. The default value is `"CAP_CIRCLE"`. 
 - `$fa`, `$fs`, `$fn` : Used by the `circle` or `sphere` module internally. Check [the circle module](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Using_the_2D_Subsystem#circle) or [the sphere module](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Primitive_Solids#sphere) for more details. The final fragments of a circle will be a multiple of 4 to fit edges.
@@ -18,34 +18,34 @@ Creates a 3D line from two points.
 	line3d(
 	    p1 = [0, 0, 0], 
 	    p2 = [10, 2, 10], 
-	    thickness = 1,
+	    diameter = 1,
         $fn = 24
 	);   
 
-![line3d](images/lib2x-line3d-1.JPG)
+![line3d](images/lib3x-line3d-1.JPG)
 
     use <line3d.scad>;
 	
 	line3d(
 	    p1 = [0, 0, 0], 
 	    p2 = [10, 2, 10], 
-	    thickness = 1, 
+	    diameter = 1, 
 	    p1Style = "CAP_BUTT", 
 	    p2Style = "CAP_BUTT",
         $fn = 24
 	);   
 
-![line3d](images/lib2x-line3d-2.JPG)
+![line3d](images/lib3x-line3d-2.JPG)
 			   
     use <line3d.scad>;
     
     line3d(
         p1 = [0, 0, 0], 
         p2 = [10, 2, 10], 
-        thickness = 1, 
+        diameter = 1, 
 	    p1Style = "CAP_SPHERE", 
 	    p2Style = "CAP_SPHERE",
         $fn = 24
     );   
 
-![line3d](images/lib2x-line3d-3.JPG)
+![line3d](images/lib3x-line3d-3.JPG)
diff --git a/examples/turtle/tree.scad b/examples/turtle/tree.scad
index 145f1a08..50cf0930 100644
--- a/examples/turtle/tree.scad
+++ b/examples/turtle/tree.scad
@@ -2,25 +2,25 @@ use <line3d.scad>;
 use <turtle/t3d.scad>;
 
 module tree(t, leng, leng_scale1, leng_scale2, leng_limit, 
-            angleZ, angleX, width) {
+            angleZ, angleX, diameter) {
     if(leng > leng_limit) {
         t2 = t3d(t, "xforward", leng = leng);
 
         line3d(
             t3d(t, "point"), t3d(t2, "point"), 
-            width);
+            diameter);
 
         tree(
             t3d(t2, "zturn", angle = angleZ),
             leng * leng_scale1, leng_scale1, leng_scale2, leng_limit, 
             angleZ, angleX, 
-            width);
+            diameter);
 
         tree(
             t3d(t2, "xturn", angle = angleX), 
             leng * leng_scale2, leng_scale1, leng_scale2, leng_limit, 
             angleZ, angleX, 
-            width);
+            diameter);
     }    
 }
 
@@ -30,9 +30,9 @@ leng_scale1 = 0.4;
 leng_scale2 = 0.9;
 angleZ = 60;
 angleX = 135;
-width = 2;
+diameter = 2;
 
 t = t3d(point = [0, 0, 0]);
 
 tree(t, leng, leng_scale1, leng_scale2, leng_limit, 
-     angleZ, angleX, width);
\ No newline at end of file
+     angleZ, angleX, diameter);
\ No newline at end of file
diff --git a/src/line3d.scad b/src/line3d.scad
index b643965f..2f25b062 100644
--- a/src/line3d.scad
+++ b/src/line3d.scad
@@ -4,15 +4,15 @@
 * @copyright Justin Lin, 2017
 * @license https://opensource.org/licenses/lgpl-3.0.html
 *
-* @see https://openhome.cc/eGossip/OpenSCAD/lib2x-line3d.html
+* @see https://openhome.cc/eGossip/OpenSCAD/lib3x-line3d.html
 *
 **/
 
 use <__comm__/__frags.scad>;
 use <__comm__/__nearest_multiple_of_4.scad>;
 
-module line3d(p1, p2, thickness, p1Style = "CAP_CIRCLE", p2Style = "CAP_CIRCLE") {
-    r = thickness / 2;
+module line3d(p1, p2, diameter = 1, p1Style = "CAP_CIRCLE", p2Style = "CAP_CIRCLE") {
+    r = diameter / 2;
 
     frags = __nearest_multiple_of_4(__frags(r));
     half_fa = 180 / frags;