When the ghost Pyramus stops and sits down on the stairs, the lead used to stop him on his mark is visible.
When the ghost is by Sylvie's bed, trying to wake her, the actor's breath is visible.
A common problem with the double-exposure style "ghost" special effect is that in some scenes, the non-ghosts appear to be the translucent ones. It is most noticeable in Sylvia's party dress on the stairs.
The conventions the film even uses are contradicted - that is for what a ghost is.
The Ghost of Alain de Francigny is silent, transparent. The three 'acting' ghosts wear bed sheets.
Not only is Alain transparent, a book on Phantom Ghosts show a a skeleton in a robe as transparent.
Still, each meeting with Sylvia and the 'fake' ghost, contradicts the movie's beliefs. Sylvia can see the ghost makes shadows. Sylvia felt the sheet when she received the locket.
Sylvia should have known the ghost was fake.
The Ghost of Alain de Francigny is silent, transparent. The three 'acting' ghosts wear bed sheets.
Not only is Alain transparent, a book on Phantom Ghosts show a a skeleton in a robe as transparent.
Still, each meeting with Sylvia and the 'fake' ghost, contradicts the movie's beliefs. Sylvia can see the ghost makes shadows. Sylvia felt the sheet when she received the locket.
Sylvia should have known the ghost was fake.