Dodger, since you mention using boolean to subtract shapes to make the windows I thought I would ask how you get the finished model to work correctly in poser. I've been trying to build my own windows and props in the same way using a copy of Truespace that I got on a magazine cover recently. The models look fine in Truespace. I then used crossroads to convert them to obj files. Unfortunately when I render them in poser, they come out solid without the shape subtracted. Can you or anyone help with this?

Daz Studio 4.8 and 4.9beta, Blender 2.78, Sketchup, Poser Pro 2014 Game Dev SR5 on Windows 8 Pro x64. Poser Display Units are inches