Quick artwork using modeling source and octane render.
It took me 6 hours for lighting, shading, designing and an hours for 4K rendering. 
( DL /  25000 samples / Two GTX1070 + four GTX 1080 )
At first, when I opened this cyborg modeling file, I was just thinking to play around with for minutes, but I couldn't stop... it was so fun.
I didn't unwrap UV, just used dirt map 
I got this modeling from Lance wilkinson /
 textures from beeple's Zero-day project sources /

Rendered with Octane Render
Color correction and postwork in Adobe After-Effects
Resolution 3840 x 2160 px
Rendertime 1 hour  ( GTX 1070 x 2, GTX1080 x 4)