The physical world requires humans to interact with it in order to survive, but interaction with the other worlds is equally important for survival, albeit in the long term rather than the short.
In my (Dr. Prof. Kazimierz Maupa) day and age, almost everyone travels openly to other worlds and some do so professionally. There are artists who are also famous for rendering only visuals from the other worlds. On artist focuses especially on one particular other world that consists of what they consider 'Scapes'. In the particular Scape displayed below, they speak of intestinal floating rock-like formations and textured darkness.