The Bluefin 21 is a AUV developed by Bluefin Robotics (Aquired by General dynamics).
The model is created in 3ds Max 2016, and rendered in V-Ray 3.4. I work as close to real world scale as i can (in cm). I build my models based on blueprints, photos and / or data found on internet.
The materials are V-ray materials with diffuse, specular and bump maps. All surfaces are unwrapped, but have overlapping texture spaces. Light mapping is not setup at the moment
For modelling i like to create hard surface models without sub-d options. I have subdivided the models before cutting out the doors or other shapes. My opinion is that this will keep polycount relatively low. The edges are bevelled in.
The shown renders are created with a studio lighting setup. The images are without Photoshop post processing, except cutting out the background an giving them a simple drop shadow.