While artists may have drawn some ideas from the Giants Causeway after extensive googling i can find no verbal recognition of this influence.

Another possible reason for this look is because original design ideas for V'Ger were for it to be very metamorphic. where the whole ship could move, create, morph as needed to accommodate other ships or needs.

"It would have 'morphed' and on the inside the walls would have been iridescent and changed as the Enterprise moved past them. You would have seen images of the Enterprise along the walls because it was being analyzed by V'ger and there would have been parts of walls that would break apart like a flock of birds or a swarm of insects," explained Taylor. "The swarms would go from one place to another and reassemble. You could think of the particles as digital energy or digital information. I wanted it to be a very metamorphical and very mysterious place

memory alpha, art team

While some of these ideas never panned out they were also incorporated into the final version of V'Ger.

Also the picture we are seeing from the question appears to be from the newer directors cut, and this picture shows how it was originally intended to look (theatrical release) a field instead of a bridge.

While artists may have drawn some ideas from the Giants Causeway after extensive googling i can find no verbal recognition of this influence.

Another possible reason for this look is because original design ideas for V'Ger were for it to be very metamorphic. where the whole ship could move, create, morph as needed to accommodate other ships or needs.

"It would have 'morphed' and on the inside the walls would have been iridescent and changed as the Enterprise moved past them. You would have seen images of the Enterprise along the walls because it was being analyzed by V'ger and there would have been parts of walls that would break apart like a flock of birds or a swarm of insects," explained Taylor. "The swarms would go from one place to another and reassemble. You could think of the particles as digital energy or digital information. I wanted it to be a very metamorphical and very mysterious place

memory alpha, art team

While some of these ideas never panned out they were also incorporated into the final version of V'Ger.

Also the picture we are seeing from the question appears to be from the newer directors cut, and this picture shows how it was originally intended to look (theatrical release) a field instead of a bridge.