The film "Quicksand" (1950) does not feature any identifiable LGBTQ+ characters or themes. Its narrative focuses on a man's descent into crime and his attempts to escape the consequences, without engaging with queer identity or experiences.

The film "Quicksand" (1918) does not appear to feature any identifiable transsexual characters or themes. Available plot summaries and historical information indicate the narrative focuses on drama and intrigue without engaging with transgender identity or experiences.

The movie does not contain any action or adventure elements.

The 1918 film "Quicksand" is an original story, not an adaptation of prior material with established characters or a depiction of historical figures. Therefore, no characters exist who were canonically or historically established as a different gender before this film.

Quicksand (1918) is an original film, not an adaptation of pre-existing material with established character races, nor does it feature historical figures or legacy characters. Therefore, no character's race could have been altered from a prior depiction.