Thanks! The window have a texture but i could have done without. Its just a blurry gray. I made them not too transparent so we dont see too much the interior that is empty, except for the last floor.
"name" : "Translucent_Glass_Sky_Reflection",
"color" : ".502,.502,.502,.6",
"f0" : ".039",
"roughness" : ".02",
"no_light" : false,
"alpha_masked" : false,
"tex_albedo" : "Translucent_Glass_Sky_Reflection.dds",
"tex_normal" : "",
"tex_roughness" : "",
"tex_opacity" : "",
"tex_reflectance" : "",
"tex_environment" : ""