After a cursory reading, I totally disagree with this ruling. This was a work-for-hire, he should not be able to profit without having to share with the other creators, such as George Lucas and Ralph McQuarrie:
http://filmsketchr.blogspot.com/2011/04/should-ralph-mcquarrie-be-angry-about.html
Besides, according to the BBC article, "If Lucasfilm could convince the courts the 3D works were sculptures" (as opposed to industrial props), "they would be protected by copyright for the life of the author plus 70 years. If not, the copyright protection would be reduced to 15 years from the date they were marketed, meaning it would have expired and Mr Ainsworth would be free to sell them." ... So, the artist was essentially arguing that these were not sculptures, despite this from his own website:
"I made no sketches, no models, no engineering drawings. I
sculpted the production moulds directly, ..." Andrew Ainsworth describing his approach to
sculpting the Stormtrooper helmet mould in 1976. (My underlining.)
Sorry, this doesn't smell right to me.
Cool
sculptures, though.