diff --git a/src/heyarne/line_us/gcode.clj b/src/heyarne/line_us/gcode.clj
index dba825e..16c609b 100644
--- a/src/heyarne/line_us/gcode.clj
+++ b/src/heyarne/line_us/gcode.clj
@@ -2,9 +2,7 @@
   "Provides functions to move from geometry types provided by thi.ng to gcode
   so you can plot them."
   (:require [thi.ng.geom.core :as g]
-            [clojure.string :as str]
-            [thi.ng.geom.circle :as c]
-            [thi.ng.geom.rect :as r]))
+            [clojure.string :as str]))
 
 ;; scroll down for a rich comment with usage examples
 
@@ -30,13 +28,10 @@
                               (g/vertices geom))))))
 
 (def gcode-seq
-  "Convert thi.ng.geom types into a sequence of G-Code to plot them. The G-Code
-  instructions are given as a sequence of vectors, where each vector is given
-  as [x y z].
+  "Convert thi.ng.geom types into a sequence of G-Code to plot them.
 
-  Returns G01 movements on the x, y, and z axis. Z is constantly 1000 in the
-  current implementation, but this might change in the future. The optional
-  parameter `r` can be used to adjust the resolution."
+  An optional parameter `{:r 10}` can be used to adjust the sampling resolution
+  for the shape."
   (comp gcode-verts->gcode-seq ->gcode-verts))
 
 (defn- geom? [x]
@@ -45,12 +40,9 @@
 ;; (pr-str (c/circle 20)) ;; => "#thi.ng.geom.types.Circle2{:p [0.0 0.0], :r 20.0}"
 
 (defn scene->gcode-seq
-  "Converts a scene into a sequence of gcode instructions. A scene is an
-  arbitrarily nested vector of geom instances.
-
-  A scene is hiccup like in that each object can be followed by a map of
-  attributes, which can provide addition information about the preceding
-  object."
+  "Converts a scene into a sequence of G-Code instructions. A scene is an
+  arbitrarily nested vector of geom instances and hiccup-like in that each
+  object can be followed by a map of attributes. The map is currently ignored."
   ([scene] (scene->gcode-seq scene {}))
   ([scene {:keys [r] :as opts}]
    (loop [[el & rs] scene