All that is really left to do now is add a few highlights across the floor directly under the near vent and along the platform edge on the left as well as on the near left hand side pillar. This serves to just break up the symmetry a little and suggest that the light is not necessarily entering the corridor from directly above – here is the final version seen in the image below.
This about concludes the tutorial and hopefully has covered all of the main stages involved. I may well proceed with the painting and polish it by adding a further layer of detail in the future but hopefully you will have gained some insight into achieving the stage we leave it at for the moment. I hope you have enjoyed following the tutorial and if interested there is one that goes alongside this detailing the making of a 3D version that can be seen here