I present you this amazing image which as not been made in Photoshop or by another application of this kind. In fact, as Clomaka say : The shot is roughly 90% straight out of Unreal .
In practice, a very small amount of assets as been use. And I must say, it is very surprising ! You can read how it was done and comments on Clomaka thread here 🙂 Note that the featured image have a 2500 x 1490 rez.