diff --git a/src/shimmers/algorithm/polygon_detection.cljc b/src/shimmers/algorithm/polygon_detection.cljc
index 5c07845d..2433a6db 100644
--- a/src/shimmers/algorithm/polygon_detection.cljc
+++ b/src/shimmers/algorithm/polygon_detection.cljc
@@ -212,7 +212,7 @@
 ;; TODO: inline cycle-clockwise-from-edge and keep track of a single list of
 ;; seen edges
 (defn simple-polygons
-  "`graph` is a digraph of points, returns a set of cycles, where cycles are a list of points.
+  "`graph` is a digraph of points, returns a set of polygons from each point cycles.
 
   They should be simple cycles without any internal edges/chords."
   [graph]
@@ -225,7 +225,7 @@
       (if (or (empty? pending) (zero? limit))
         (do (when (and (zero? limit) (> (count polygons) 2))
               (println "halted after " (count polygons) " polygons"))
-            polygons)
+            (map gp/polygon2 polygons))
         (let [edge (first pending)
               [p q] edge
               cycle (cycle-clockwise-from-edge g p q)]
@@ -413,6 +413,5 @@
                          (for [[p q] (partition 2 1 (concat [a] isecs [b]))]
                            [p q (g/dist p q)]))))))
           (lg/weighted-graph))
-         simple-polygons
-         (map gp/polygon2))
+         simple-polygons)
     [polygon]))
diff --git a/src/shimmers/sketches/intertwined.cljs b/src/shimmers/sketches/intertwined.cljs
index a9d5cdd8..528a3e80 100644
--- a/src/shimmers/sketches/intertwined.cljs
+++ b/src/shimmers/sketches/intertwined.cljs
@@ -228,7 +228,7 @@
                :polygon polygon))
 
       :polygons
-      (let [polygons (mapv gp/polygon2 (poly-detect/simple-polygons graph))]
+      (let [polygons (poly-detect/simple-polygons graph)]
         (q/stroke 0 0.5)
         (q/stroke-weight 0.5)
         (swap! defo assoc :polygons polygons)
diff --git a/src/shimmers/sketches/network_effects.cljs b/src/shimmers/sketches/network_effects.cljs
index e70fe663..68f644f1 100644
--- a/src/shimmers/sketches/network_effects.cljs
+++ b/src/shimmers/sketches/network_effects.cljs
@@ -99,7 +99,8 @@
         polygons (->> conns
                       (mapv :points)
                       poly-detect/edges->graph
-                      poly-detect/simple-polygons)]
+                      poly-detect/simple-polygons
+                      (map g/vertices))]
     (assoc state
            :nodes nodes'
            :quadtree (build-tree bounds nodes')
diff --git a/src/shimmers/sketches/spaces_divided.cljs b/src/shimmers/sketches/spaces_divided.cljs
index 2abd8117..23381cd1 100644
--- a/src/shimmers/sketches/spaces_divided.cljs
+++ b/src/shimmers/sketches/spaces_divided.cljs
@@ -66,8 +66,7 @@
 (defn calculate-polygons [edges]
   (->> edges
        poly-detect/edges->graph
-       poly-detect/simple-polygons
-       (mapv gp/polygon2)))
+       poly-detect/simple-polygons))
 
 (defn inset-shapes [polygons]
   (->> (for [poly polygons