anamorphosis
distorted projection that requires the viewer to occupy a specific vantage point, use special devices, or both to view a recognizable image
en-GB/ænəmɔːfəsɪs/
en-US/ˌænəˈmɑɹfəsɪs/
distorted projection that requires the viewer to occupy a specific vantage point, use special devices, or both to view a recognizable image