I thought they were meant as Easter Eggs.
Very hard to FIND Easter Eggs, but...
I meant in the mod. Ah well.
Anyway, I've worked out why I was getting inconsistent results from my earlier testing of swapping Environment files around.
It turns out pretty much any CGR model is interchangable with any other. But they'll still render at the correct place on the track.
So if you dump one of the environment options as your ship model, it shows that piece of environment in the correct place on the track and you effectively have no ship (which is an interesting way to play).
Where I was confused is that it seems not all the Environment files are used.
For example the
SetPieces.cgr model isn't used anywhere (shame, 'cos it has these cool spinny things along side the track -- although these do negatively affect framerate substantially).
So, I'll put together an update with more checks to stop ViRUS crashing things and an additional tab with environment options on.