help plez werd map glitch

help plez werd map glitch
this is in hammer
i am re makeing downtown map
and this happend WARNING URL TO A PIC


plz help

(User was banned for this post ("plz yse r3ak words." - UncleJimmema))

You are looking out into the void without a skybox texture within your screenspace. Cover parts of the map that you would otherwise use nodraw for with the skybox texture.