It´s kind of strange that they go with that structure design, as it was a compromise during the originals production. Giger wanted to build a genuine hallway he designed on paper before. Fox said no for cost reasons, so they refurbished the bone wall structure of the egg chamber and glued them on the outer shell of the derelict (the convex shape in the picture above the bone wall). As to be read in the Giger´s Alien book.
Well, after all everybody remembers it like that from the movie. Just hope they don´t play that save card, to show us what we are used too and make it fan candy on the cost of a coherent script and sense in universe.