Sample Video on YouTube:
One of my Windows10 rigs had trouble (CTD) when I tried to launch "Big Willow" via Steam; it appears that that machine's Steam installation failed to see skybox until I moved "BigWillow.gtl" and "BigWillow_Map.gtl" from "BigWillow" folder to the parent "WillowSprings" folder. I don't get it, but the track loads now so WTF.