The materials are related with the render motor, so i will explain them here.
The illumination was very important for the material aspects, such as the skin and a good metal simulation. Based on the HDRI lighting I achieved some very convincing results, such as the metal reflections - such realism shows in the whole scene (Fig.17 - metal material parameters; Fig.18).
Post - Production
For the final image, I composed it in a simple way in Photoshop:Â adjusting levels, making colour corrections, and using Z-depth rendering for the depth of field effect. I then worked on the main areas with additional layers for glows, blurs and some sharpening (Fig.19 - final image).