The picture is seen trough the transparent spot of your tiles and includes a parallax outcome when scrolling which gives an illusion of depth. → وَهْمٌ iluze illusion Illusion παραίσθηση ilusión illuusio illusion iluzija illusione 錯覚 환각 illusie illusjon iluzja ilusão иллюзия illusion ภาพลวงตา yanılsama ảo tưởng 幻想 Compared https://www.youtube.com/watch?v=snr3is5MTiU