Thank´s a lot for all the comments.The dio is marching . this so far. Iwant to paint the ground very dark , without sand and stones only paints.When the dio is finish I´ll explain the idea.
Emperor , I have used for the planks : Balsa wood and polystyrene sheets . The sand bags are made with Magic Sculp. Special Thanks to Thomas Dürrschmidt ( Always Great ) and Santi Fernández ( perdona por participar tan poco en los foros , pero siempre miro tus trabajos ).