Retro sci-fi submarine

This is a small retro sci-fi tactical submarine concept. The goal was to create something cool looking and to dust off my substance painter skills. Almost all modern military submarines are painted black or dark grey...so I decided to go with something more interesting.
I used graphic elements from military aircrafts and tanks from WW2.
The first five renders are created using V-ray and the others are rendered in substance painter and composited in photoshop.
I had a lot of fun doing this one. I hope you like it.
Cheers :)