Create a highly detailed, 8K digital painting of an athletic man in his 30s, wearing gold obsidian armor and futuristic techwear, including a ski mask, in the midst of an Ancient Forest. The character's face should be the main focus, with 'blackness instead of eyes' and a 'golden key' incorporated. The artwork should exhibit lifelike details, micro details, and adhere to the golden ratio, with a surrealistic and cinematic tone. Utilize matte painting techniques and consider the styles of Ross Tran, WLOP, Andrei Riabovitchev, Marc Simonetti, and Greg Rutkowski. Employ Octane or Unreal Engine 5 for rendering