Realistic uses the render material settings. First check that the Render Materials are set as expected for each elements.
For instance, the solid representing the actual glass is set to the "Glass" subcategory in the family. Then check that it has a material parameter set for it. Finally, check that the material parameter for that family in your project is set to a glass material that will be transparent in rendered and realistic views.
Also - Is your wall cut by the void in the door/window family?
Jay Colcombe
Autodesk Certified Instructor
Revit Architecture & Structure Certified Professional
AutoCAD Certified Professional
B.Sc. Hons Civil & Structural Engineering
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