Matte-painting:
Timkin Vitali (https://www.artstation.com/artist/vagrantdi)
3d scena:
Mikalai Sinitsa (https://www.artstation.com/artist/nikola)
Japan Heavy Tank Type 5:
Galevskyi Alexander (https://www.artstation.com/artwork/japan-heavy-tank-type-5-heavy-tier-x)