Bonjour Michael,

From Revit, I exported the 3D view of the completed building in .sat format. I chose this format because MoI 3D and Blender can import .sat files.

Then I looked at the window panes in the Blender file to apply a transparency property to them for rendering; and that's when I realized that the window panes were made up of two elements. Intrigued, I checked to see if the same thing happened in MoI 3D, and it turned out that it did, as you can see. That's it, nothing else.

For your information, many 3D building construction elements are created by manufacturers in DWG, DXF, RVT, etc. formats for use by architects, engineers, and building design office technicians. This is the case, among others, for the windows and French windows that I used.

It intrigues me, but it doesn't hinder my project.