some polygons are now less colored

IV/Makefile

@@ -102,10 +102,13 @@ fig8-definition-of-a-bend_2SELECT = wm_debug where name='fig8' AND stage='bbends
 
 fig8-elimination-gen1_1SELECT = wm_debug where name='fig8' AND stage='bbends' AND gen=1
 fig8-elimination-gen1_2SELECT = wm_debug where name='fig8' AND stage='bbends-polygon' AND gen=1
+fig8-elimination-gen1_2LINESTYLE = dotted
 fig8-elimination-gen2_1SELECT = wm_debug where name='fig8' AND stage='bbends' AND gen=2
 fig8-elimination-gen2_2SELECT = wm_debug where name='fig8' AND stage='bbends-polygon' AND gen=2
+fig8-elimination-gen2_2LINESTYLE = dotted
 fig8-elimination-gen3_1SELECT = wm_debug where name='fig8' AND stage='bbends' AND gen=3
 fig8-elimination-gen3_2SELECT = wm_debug where name='fig8' AND stage='bbends-polygon' AND gen=3
+fig8-elimination-gen3_2LINESTYLE = dotted
 
 fig5-gentle-inflection-before_WITHDIV = 2
 fig5-gentle-inflection-before_1SELECT = wm_debug where name='fig5' AND stage='bbends' AND gen=1

IV/layer2img.py

@@ -70,8 +70,16 @@ def plot_args(geom, color, maybe_linestyle):
     if geom is None:
         return
 
+    # polygons either have fillings or lines
     if geom.geom_type[0] == 'Polygon':
-        return {'cmap': CMAP}
+        if maybe_linestyle:
+            return {
+                'edgecolor': 'black',
+                'linestyle': maybe_linestyle,
+                'color': (0, 0, 0, 0),
+            }
+        else:
+            return {'cmap': CMAP}
 
     r = {'color': color}
     if maybe_linestyle == 'invisible':

IV/mj-msc.tex

@@ -1068,9 +1068,9 @@ The smaller the distance $d$, the more similar the bends are.
 
 \subsection{Elimination Operator}
 
-Elimination was explained reasonably well in the original paper.
 Figure~\ref{fig:elimination-through-iterations} illustrates steps of figure 8
-from the original paper.
+from the original paper. There is not much to add to the original description
+beyond an illustrated example.
 
 \begin{figure}[ht]
     \centering