The geodesic geometry is a theoretical optimum. Each vertex is surrounded by a ring of vertexes, each edge surrounded by edges, faces by faces, yada, yada....
Ease of construction depends on the materials and methods used.
As for materials, in the 1980s we used plywood. Today I'd favor something that gets delivered in drums.
Square windows? Windows are either for light or views. A lantern at the zenith can illuminate the entire interior. View windows can be integrated -- take a hexagon, divide into two triangles and a rectangle. Let you imagination run wild from there.
Fuller's Flys Eye domes relied on a circular opening. Those can be glazed with an ETFE pillow restrained with a hoop.
[As for Blender, it looks like I need to turn on Screen Space Reflections -- if I can find that.
]