Two pictures showing the islands with most of their Sand and grit applied, the bottom image shows some of the string I used for creepers. The top of each island was covered in Mod Rock to give the look of over hanging turf with the rock eroded from underneath it. If you have never come across ModRock you should check it out for terrain modeling. Its basically gauze bandage impregnated with plaster of paris, great for creating soft contours. The top picture shows the islands drying out.