Extreme wide angle views of locations shot with a fish-eye lens need not always look too distorted to represent interiors, and can retain straight vertical lines....
The fish-eye lens is often dismissed as a bit of a one-trick pony. It’s associated with oddly distorted views, and effects often politely referred to as ‘artistic’.
In reality, the circular fisheye view, (which is all I’m looking at here) is a perfectly valid projection...