Many years ago I played the computer game version of 'The Phantom Menace' on a friend's PC. I never finished it and it's horribly dated now, but the way it made a linear world feel vast and open was really amazing; no other game I've played has done so good a job (the
Half Life 2 games for example do an awful job of making the world look anything but totally linear). So giving the feeling that the world you're in is much bigger than the world you're seeing is something I aspire to. Glad you got so caught up in the illusion.
Sadly filling in all the odd corners would only create more odd corners to fill, and that, I fear, is the road to where madness lies.
As for the lake in the grey world, I concur; there are a lot of little things like that in 'Eurydice' that would benefit from being changed, and a few very large things too. I've been toying with the idea of making 'Eurydice DX' for a while now, but I think it'd be such a big job to get it up to a standard I could be happy with now that not a lot of it would be recognisable afterwards.
I might get to it one day, but at the moment I'm focussing my Knytting time on new creations.
Still, thanks for posting and letting me know you enjoyed it. It's great to get feedback.