03-01-2015, 08:44 PM
That's just a convention most old roguelikes have. I attempted to draw separate side-facing doors, but because of the perspective they don't look that great. And if a creature stands in an open side-facing door, it looks especially odd.
![[Image: mockup_by_dragondeplatino-d8k2od5.png]](http://fc02.deviantart.net/fs70/f/2015/060/a/6/mockup_by_dragondeplatino-d8k2od5.png)