diff --git a/shapes2d.scad b/shapes2d.scad
index 4c11efd..2f739f1 100644
--- a/shapes2d.scad
+++ b/shapes2d.scad
@@ -472,7 +472,7 @@ function _normal_segment(p1,p2) =
 
 // Function: turtle()
 // Usage:
-//   turtle(commands, [state], [return_state])
+//   turtle(commands, [state], [full_state], [repeat])
 // Description:
 //   Use a sequence of turtle graphics commands to generate a path.  The parameter `commands` is a list of
 //   turtle commands and optional parameters for each command.  The turtle state has a position, movement direction,
@@ -481,9 +481,8 @@ function _normal_segment(p1,p2) =
 //   the computed turtle path.  If you set `full_state` to true then it instead returns the full turtle state.
 //   You can invoke `turtle` again with this full state to continue the turtle path where you left off.
 //   .
-//   The turtle state is a list with three entries: the path constructed so far, the current step as a 2-vector, and the current default angle.
-//   .
-//   For the list below, `dist` is the current movement distance.
+//   The turtle state is a list with three entries: the path constructed so far, the current step as a 2-vector, the current default angle,
+//   and the current arcsteps setting.  
 //   .
 //   Commands     | Arguments          | What it does
 //   ------------ | ------------------ | -------------------------------
@@ -613,7 +612,7 @@ function _turtle(commands, state, full_state, index=0) =
         ) :
         ( full_state ? state : state[0] );
 
-// Turtle state: state = [path, step_vector, default angle]
+// Turtle state: state = [path, step_vector, default angle, default arcsteps]
 
 function _turtle_command(command, parm, parm2, state, index) =
     command == "repeat"?
diff --git a/skin.scad b/skin.scad
index 87ae8d4..7122b10 100644
--- a/skin.scad
+++ b/skin.scad
@@ -1184,7 +1184,7 @@ function path_sweep(shape, path, method="incremental", normal, closed=false, twi
   assert(is_undef(normal) || (is_vector(normal) && len(normal)==3) || (is_path(normal) && len(normal)==len(path) && len(normal[0])==3), "Invalid normal specified")
   assert(is_undef(tangent) || (is_path(tangent) && len(tangent)==len(path) && len(tangent[0])==3), "Invalid tangent specified")
   let(
-    tangents = is_undef(tangent) ? path_tangents(path) : [for(t=tangent) unit(t)],
+    tangents = is_undef(tangent) ? path_tangents(path,closed=closed) : [for(t=tangent) unit(t)],
     normal = is_path(normal) ? [for(n=normal) unit(n)] :
              is_def(normal) ? unit(normal) :
              method =="incremental" && abs(tangents[0].z) > 1/sqrt(2) ? BACK : UP,