Hi there Guys, I do have question for you experts..XD! If I use object styles it may be useful to set diffeent color for example if you have separate materials and I wish to manage to have one color line for the material of Concrete and One for Wood. The problem comes when I try to set object styles and with walls beacause with system families is not possible for me ( at the moment ) understand wher attach the new subcategory of the wall inside the family of a wall to obtain a real behaviour in plan and sections. In fact having create two different subcategories for those material I cannot see on the prop panel where change a subcategory of the wall. Moreover I applied filters for changing view color for materials but when you go to a plan or section the model is constrained to the object styles more than filters so I find color same for both type of wall edges...Any solution from you?