Thanks to all of us for your nice words:
Nige, the material among bricks are spackle, the material that professional wall painters use for fill little imperfections in the walls before paint it.


hope that this photos explain better than my words your question
Bradley: Yes I need improve my photo skills :-)
Claude: you not need copy to nobody... but I´m happy to share my tecniques with all Armorama contributors :-)
Jean: good observation! IMHO te secret for a good diorama architecture is based in unbalanced volume, texture and how from where the piece is cut. Here I try make a unbalanced piece cutting one of the pilars of the gate.
cheers