A quick Vray exercise I did in class as a demo for my students at ODD School.
The tank model I used was done by Oscar Dominguez and donated to BadKing, where you can get it for free. The model is fantastic and Badking is a great resource that I encourage everyone to visit and contribute to.
I'm also using an HDRI from HDRMaps, which is one of the best sites to get extremely high quality HDRIs at unbelievable prices, and they also have lots of freebies.