Index: /issm/trunk-jpl/src/m/plot/plot_overlay.m
===================================================================
--- /issm/trunk-jpl/src/m/plot/plot_overlay.m	(revision 22922)
+++ /issm/trunk-jpl/src/m/plot/plot_overlay.m	(revision 22923)
@@ -49,4 +49,7 @@
 		radar=sum(radar,3)/3;
 	end
+end
+if getfieldvalue(options,'backgroundbtw',0)
+	radar(find(radar==0))=1; %Change background from black to white
 end
 radar = radar.^(contrast);