An easy way to enhance the look of any diesel locomotive is to blacken the grills and vents to provide more depth.  You can use a black wash to bring out the grill or vent details.  Weathering powders are extremely effective bringing out locomotive vent and grill details.

For the TL;DR - just scroll down an look at photos is useful since it's about architecture :) Feedback appreciated !

I want my layout to have a high level [ ... ]

Micro-Trains Military Barracks Build by Modelersguild.com

Building this Z-Scale kit was a real pleasure. The parts fit nicely, the materials were right, [ ... ]