The round walls - the smooth curves of these houses - would not look good.
The bumpmaps have holes in them to illustrate stone materials.

I would also have to change the bumpmaps - And it seems the models are using the same texture - so it would become a complete mess. It would just look like grey stones. or plastic.

Even if i would like to add mos on them - the mos would proberly show up the stranges places on the models - because i would have no control on which surfaces the mos would be on the 3D models.

But yes - I see what you mean.
Anyway - If We had those metal buildings - The design of the village/city would be different.
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I imagine somthing like Laser lights - going around buildings too..
Electronic panels...And doors would be slightly different...

Is Thyferra a place where they do those pyramid sliding doors?
Im actually not familiar with that name.