> It looks practically photorealistic.
what has improved a lot recently is the physically based rendering - specifically, the lighting. Looking at the steam page, this train game has that type of lighting.
Another game that uses similarly realistic lighting is https://store.steampowered.com/app/2406770/Bodycam/
When the dev for BodyCam posted his initial streams, I thought it was fake. Also was a solo dev though I think he either has a partner or a team now