Art test I recently completed.
Took 3 days total. The brief was to focus on one polished modular building while the sourounding area is just blocked out.
Use of trims, polycount saving and optimization was another area I had to focus on. The whole building uses just 4 materials (incuding the smaller props such as the cables pipes etc) and 2 decals. I also had a specific texel density rule set at 512/m2
Renders are done in Unreal 5 Using Lumen.