Movies and animations
Loki
Loki is an American television series, based on Marvel Comics featuring the character of the same name. It is the third television series in the Marvel Cinematic Universe (MCU) produced by Marvel Studios, sharing continuity with the films of the franchise. The series takes place after the events of the film Avengers: Endgame (2019), in which an alternate version of Loki created a new timeline.
In season 1 episode 3 impossible triangles can be seen on bulding walls of city Lamentis.