Yep, finally finished tinkering with background. Decided to go with reflective floor effect (much like in The Illusive Man's Chamber from Mass Effect 2). My girlfriend helped me with pre-adjusting the Hyena itself and added some nice optic lights plus showed me a few tricks.
Hyena is a property of Digital Extremes, along with Warframe, Corpus and all associated characters, weapons etc.
You are welcome to download this wallpaper, although it's mostly for wide-screen monitors.