IP is one of those areas where programmers like to imagine the law is a function definition which provides clear answers. And aside from obvious stuff like selling bootleg copies of a movie - it doesn't.
Whether the pattern of light hitting a building is copyrightable is likely to be an under-explored area of case law. E.g. in the UK it would probably have to be a work of 'artistic craftsmanship' which is not defined in the statute. But the Eiffel tower is in France. So now you have two slightly differing sets of copyright law.
In the end many IP cases come down to bluffing because the actual class of question has never been settled by a judge.
On the other hand you have other cases like Banksy today loosing a case on trademarking one of his paintings. Which was dumb because he'd have got further with copyright infringement.
Whether the pattern of light hitting a building is copyrightable is likely to be an under-explored area of case law. E.g. in the UK it would probably have to be a work of 'artistic craftsmanship' which is not defined in the statute. But the Eiffel tower is in France. So now you have two slightly differing sets of copyright law.
In the end many IP cases come down to bluffing because the actual class of question has never been settled by a judge.
On the other hand you have other cases like Banksy today loosing a case on trademarking one of his paintings. Which was dumb because he'd have got further with copyright infringement.