James Cameron is being sued by British artist Roger Dean over his Oscar-winning film Avatar.
Dean, who has designed album covers for the likes of prog-rock bands Yes and Asia, filed a legal action at a court in New York last week, alleging that the film copied ideas from his original images.
The artist is suing for 50 million US dollars (around £33 million), reported BBC News.
In his legal action, Dean claimed the Canadian filmmaker had "studied and referenced his art in preparation for the film", especially his paintings of floating islands and the sky, which was seen for the fictional alien planet of Pandora.
Cameron, who won the Oscar for best director for Titanic, has said he first came up with the idea for Avatar in 1995.
The 58-year-old has already announced two Avatar sequels are in the works, with the first due in December 2014. He has been writing the script for the sequel.