very large scale MASTER PLAN of riyadh expo 2030 ,inspired by dubai expo 2020 , separate exhibition pavilions of all the countries , designed by colalboration of jean nouvel and Bjarke Ingels , walking robots , flying robots , kiosks, multiple pavillions of different shapes, futristic buildings , metal concrete glass fabric wooden textures , professional rendering, color grading , realistic details, corona render, 8k