hammer is being very cringe to me

In game my water functionally works but the texture for it doesn't, i know that means my map is leaking somewhere but whenever i load up the point file to tell me where it points in a direction that doesn't make any sense as that area is completely covered by walls / skybox. i would really...

Hammer looks like this for me right now There's a bunch of white lines there and it makes it so that I am unable add blocks or move the camera. I tried switch to the various views but that also didn't work, I'm not sure if I accidentally clicked a button but it was working a few months ago so...