Something new for something old.
GM_TrainCity is probably one of my favourite train build maps in GMod, but it hadn't seen an update in a long time, so it still used the first-gen TrakPak models. I contacted the authors and they handed it off to me.
Many changes have come and gone since I started last September, and for the sake of my own sanity I won't document absolutely everything.
Area portal bugs with build sheds
Night skybox illumination error
TrakPak 3 replacement