I made this factory building using the Half-life 2: Episode 2 version of Hammer in August, 2014. The challenge was to build something based off a reference image, and after I did that, I experimented around with the lighting for fun. There’s not much to it, but it was good practice for environmental design using a reference image. [Download Link Pending].
If I did it again, I’d either make it part of a larger level with a beginning and end or just try to replicate it in a new engine with some higher detail and custom materials to closer match the reference.