Index: /issm/trunk-jpl/src/m/plot/plot_overlay.m
===================================================================
--- /issm/trunk-jpl/src/m/plot/plot_overlay.m	(revision 21735)
+++ /issm/trunk-jpl/src/m/plot/plot_overlay.m	(revision 21736)
@@ -47,5 +47,7 @@
 	radar=sum(radar,3)/3;
 end
-%radar(find(radar==0))=1; %Change background from black to white
+if getfieldvalue(options,'backgroundbtw',0)
+	radar(find(radar==0))=1; %Change background from black to white
+end
 
 %InterpFromMeshToGrid