Rendered with V-Ray (all materials made in v-ray, but some diffuse, reflection/gloss and bump textures included for easy recreation in different engines and software).
This model can be purchased with many other in rooftop model pack: Rooftop items collection *high/low poly versions*. Check my products to see it.
Highpoly model - 9000
Lowpoly model - 900
Highpoly model - 11000
Lowpoly model - 1200
Note: Remember to download textures located in separate file cb_tex.zip