when i go onto the realm everything is clear all i can see is the sky and animals

when i went to start on the realm i share with my friends it asked me if i would like to download the newest update and i said yes, now all i can see is the sky and when i get close to anlimals they look shiny like the sun is reflecting off of them. when i place blocks i can't see them but i can see my bed when i'm near it and my chest when i'm near it