I would emphasise the core of the programme remains Japanese which will result in a number of artefacts or incorrect displays so far as text displays on sceen are concerned. For what appears to be a home programmed game, the author of BVE has done a very nice job. Browsing through the web site it appears the game has evolved from a very simple Railsim style display to the relatively sophisticated Direct 3D graphics now on display. The screenshots below illustrate what I mean. The rail infrastructure and stations etc.
Lines rise and fall on elevated concrete sections, flying junctions and different elevations.
The current version does not have much in the way of additional scenery off track, a textured and shaded grass landscape rather than buildings, trees or hills. The tunnel interiors are excellent. There is no dynamic scenery, moving trains or people though a couple of the routes have static trains on sidings or loop lines at stations. However the cream of the graphic effects is that once the train is under motion the cab sways and bounces in a most realistic way and banks around elevated curves. The combination of the track graphics and the movement of the cab gives the most authentic sensation of a moving train I have seen in a simulation to date.