A set of panoramic windows of modern apartment buildings 1
Version of Corona 7
CoronaLegacyMtl materials
In versions of CoronaRender 6 and below CoronaLegacyMtl=CoronaMtl
CoronaLegacyMtl requires a Corona Renderer version at least 1.5 as the maps are designed to use PBR (roughness-metallic)

For Corona render it is recommended to install a version not lower than 1.5 since the glossiness of the materials is configured with PBR in mind.