Creative Bloq – Optical Illusions: https://www.creativebloq.com/art/trompe-loeil-12121498
Different channel 4 idents: https://theident.gallery/menu_channel_channel4.php
Channel 4 statement on why they were created in the first place: https://www.channel4.com/corporate/about-4/who-we-are/what-is-channel-4
