radiator grille 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.