Set lamps SLV SLV Soprana (PD-1, PD-3, PD-5), Lasson (PD-1, PD-3, PD-2), Soprana Cone (PD-2) Manufacturer: SLV Country: Germany Series: Soprana PD-1, the ceiling height (cm): 20 Length of the ceiling (cm): 80 Width of the ceiling (cm): 30, PD-3, the ceiling Diameter (cm): 15.5 Height of the ceiling (cm): 40 PD-5 Diameter of the ceiling (see ): 50 Height of the ceiling (cm): 26 Series: Lasson PD-1, the ceiling height (cm): 20 Length of the ceiling (cm): 80 Width of the ceiling (cm): 30, PD-3, the ceiling Diameter (cm): 15.5 Height the ceiling (cm): 40 PD-2 Diameter of the ceiling (cm): 45 Height of the ceiling (cm): 25 Series: Soprana Cone PD-2 Diameter of the ceiling (cm): 14.4 Height of the ceiling (cm): 35.2 Whatever Lasson smoothly render the model, you need to set the Light Cashe Raytrace = 0,5, at least. For light control, except for the light bulb VrayLight, still used submaterial VrayLightMtl.