Sometimes - depending on how the model was built and textured - you can also extract part of it in Poser and then tweak that part (rotate like a door or window, move it). In your shutters example - if the shutters are completely modelled and textured, you can extract them, change their rotation or position. Make the original part transparent and you have a working shutter. You can do this in the groupeditor in Poser. Depending on how it is modeled, it can be very good or not so good. If a single plane was used in the model, it won't have any thickness. For that you need to use a modeling tool