Some teletext/videotex standards works with more than just alphanumerical characters. Like the Canadian Telidon, which used vector graphics. These are Telidon images, made by Jacques Palumbo in 1986.
Meanwhile in Japan, videotex was more complex: it was alphaphotographic. That is a combination of text and hi-res photos. It supposedly worked like a fax machine for the TV. Pic or it didn’t happen?