+#bad trick, waiting for a bug fix... : load twice the image :-(
+new LoadHola image1
+//new LoadHola image2
+
+connect image1.Out surface1.In
+//connect image2.Out surface2.In
+connect image1.Out surface2.In
+
+set surface1.Isovalue 100
+set surface1.Opacity 100
+set surface1.Colour "0.5 0 0"
+set surface1.Title "Iso-surface 1"
+
+set surface2.Isovalue 200
+set surface2.Opacity 20
+set surface2.Title "Iso-surface 2"
+