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rename to docs/images/lib3x-function_grapher-1.JPG
diff --git a/docs/images/lib2x-function_grapher-2.JPG b/docs/images/lib3x-function_grapher-2.JPG
similarity index 100%
rename from docs/images/lib2x-function_grapher-2.JPG
rename to docs/images/lib3x-function_grapher-2.JPG
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diff --git a/docs/lib2x-function_grapher.md b/docs/lib3x-function_grapher.md
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rename from docs/lib2x-function_grapher.md
rename to docs/lib3x-function_grapher.md
index fc09a1ce..ef55dc88 100644
--- a/docs/lib2x-function_grapher.md
+++ b/docs/lib3x-function_grapher.md
@@ -7,7 +7,6 @@ Given a list of points `[x, y, f(x, y)]` where `f(x, y)` is a mathematics functi
 - `points` : A list of points `[x, y, f(x, y)]`. See examples below.
 - `thickness` : The face or line thickness.
 - `style` : The style of the graph. It accepts `"FACES"`, `"LINES"`, `"HULL_FACES"` and `"HULL_LINES"`. The default value is `"FACES"` which simply takes `f(x, y) - thickness` for each point to build a bottom. It may cause thickness problems when slopes is high. The `"HULL_FACES"` value can solve the problem but is slow. When assigning `"LINES"`, it uses lines to connect points. The `"HULL_LINES"` is very very slow; however, the model might look smoother if you have a small `$fn`.
-- `slicing` : Given a rectangle, we have two ways to slice it into two triangles. Using this parameter to determine the way you want. It accepts `"SLASH"` (default) and `"BACK_SLASH"`.
 - `$fa`, `$fs`, `$fn` : Used by the `circle` or `sphere` module internally. It affects the speed of rending. For example, a large `$fn` may be very slow when rending. 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. 
 
 ## Examples
@@ -25,7 +24,7 @@ Given a list of points `[x, y, f(x, y)]` where `f(x, y)` is a mathematics functi
 	
 	function_grapher(points, thickness);
 
-![function_grapher](images/lib2x-function_grapher-1.JPG)
+![function_grapher](images/lib3x-function_grapher-1.JPG)
 
 	use <function_grapher.scad>;
 	
@@ -50,7 +49,7 @@ Given a list of points `[x, y, f(x, y)]` where `f(x, y)` is a mathematics functi
 	
 	function_grapher(points, thickness);
 
-![function_grapher](images/lib2x-function_grapher-2.JPG)
+![function_grapher](images/lib3x-function_grapher-2.JPG)
 
 	use <function_grapher.scad>;
 
@@ -76,31 +75,4 @@ Given a list of points `[x, y, f(x, y)]` where `f(x, y)` is a mathematics functi
 	
 	function_grapher(points, thickness, style);
 
-![function_grapher](images/lib2x-function_grapher-3.JPG)
-
-	use <function_grapher.scad>;
-
-	function f(x, y) = 
-	   30 * (
-	       cos(sqrt(pow(x, 2) + pow(y, 2))) + 
-	       cos(3 * sqrt(pow(x, 2) + pow(y, 2)))
-	   );
-	
-	thickness = 2;
-	min_value =  -200;
-	max_value = 200;
-	resolution = 10;
-	style = "LINES"; 
-	slicing = "BACK_SLASH";
-	
-	points = [
-	    for(y = [min_value:resolution:max_value])
-	        [
-	            for(x = [min_value:resolution:max_value]) 
-	                [x, y, f(x, y)]
-	        ]
-	];
-	
-	function_grapher(points, thickness, style, slicing);
-
-![function_grapher](images/lib2x-function_grapher-4.JPG)
\ No newline at end of file
+![function_grapher](images/lib3x-function_grapher-3.JPG)
\ No newline at end of file