In my texture browser, some signs are not showing up. They appear as normal if I apply them to a wall, but in the browser I don't see them. It is not the same ones every time, either.

Also, I put a pipe in my map (a4_destruction\fin4_bluepipe_bluepipe.mdl), as a prop_dynamic, which is what it says it should be. But it shows up as a black pipe-shaped hole in the world. I have never had this problem before. There is a light in the room, for what it's worth. Everything else looks fine. It's just this darn pipe.

Anyone else had either of these problems? If so, do you know of a solution?

I've never had a problem with a pipe, but some signages, overlay and toxic slime textures also show up irregularly in my Hammer. Don't know what this causes.