Walking thru my walls

On one of my buildings I can walk thru the outside walls it is werid
any Idea what is causing me to be able to walk thru my own walls?

EDIT: Prop_physics also go thru the wall.

You are certain it isn't an entity that is set as "not solid" or something? If not, I suggest rebuilding the brush.

rebuild it no thanks man I did a lot of work on it . It is just a normal block brush.

You can walk through "walls" which have been made inside a 3D skybox, have you tried making one of those? Otherwise check the textures it's made out of...

Ok i think I know why it is doing it just no clue how to fix it. I have
my box I just want to make the top face invisable and able to walk thru
it. I set the box to func_brush with a no solid propertie. So I want to
know if I can make the top part of my "box" be invisable but also so
that I can walk thru it.

My guess would be to make the top part of the box seperate, make just that a non-solid, and apply the nodraw texture on it. Then set the rest of the box back to a solid.

Edit: Or, if you want the top to be invisable and be able to walk through it, why make a brush there at all? It seems like it would have the same effect and less work.

OK man I am trying to say I have made ALOT OF WORK ON THE BUILDING LIKE
WINDOWS DECALS ALOT OF STUFF there has to be a texture that fixes it so
I can. I am not rebuilding the brush

If you just want the top changed, you could probably just use the clip tool and clip it out, so the building stays there and you can take the roof out/make changes to it, and the building stays the same.

No rebuilding needed.

alright ill give that a try.