the paintings will take you to different places depending what order you visit the worlds in. so you just have to find the painting in another world that will take you there.
the order your supposed to visit them is for the guide to work
cap - cascade - sand - lake - wood - cloud - lost - metro - snow - seaside - lunch - ruined - bowser - moon
otherwise find the painting in another world that will take you there. you'll get there eventually.
thank you !