Great work Carlos, won't you mind sharing some of you secrets ? Would like to start on some building but never done wonder where to start. Paster of Paris, etc..
Keep up the good work.

Denis

Alex, Denis thanks for your attention.
Denis, explain how make this tower in detail its a bit long. in essence you must make a "core" in plywood or carboard and late added some material for make the texture. This is the case in this model.I made the structure in 5 mm plywood and glued a piece of cork in the sides of the walls that must be destroyed .
the texture walls are from two different materials cork and peebles. first I cut all cork bits and glued them in the main structure, late I fill with white glue the spaces and trow peebles inside cover with talcum podwer and with a roll bottle equalize all pebles for that have the same level that cork. when dry I fill spaces among peebles with spacke and clean the excess with a scotch brite or sponge.
hpe that this will be clear.
CArles