camera screen

it's easy to make switch, when you press it you see camera. But I want to make camera screen what is showing all of time in the wall. I have seen one in laboratory level of psychophobia. I hope you understood what I meant. So, hoew I can do this?
I'm usin DB2 skulltag (doom in hexen format)

http://zdoom.org/wiki/SetCameraToTexture

Just use a script OPEN instead of having a switch trigger the script.

Thanks! I hope this works

that works perfectly, but how I make second wall with different camera in same map?

Just define a second camera texture (eg TCAMTEX2) and use that.

Enjay said:

Just define a second camera texture (eg TCAMTEX2) and use that.

I have tried it, but didn't work. Is here any good example wad?