[TUTORIAL] Custom Chamber Signs (Without VScripts)
What the OP means by "no scripts" is that it doesn't require a custom VScript, while the method Portal 2's default SP/co-op campaigns use for their signs does. Trying to use Valve's method has proven highly problematic so far when it comes to custom maps (doing it wrong causes the signs in Valve's maps to break, for starters, and having multiple customs installed with separate versions of the file controlling the signs leads to conflicts), so the ability to do this another way, without the need to edit vital game script files, and get a reasonably-good-looking result out of it to boot, is helpful.
It may not be the perfect method, but it'll get us far enough for now. 
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Here's a tip I found for making the sign appear to "flicker on" not mentioned in the OP:
Make whatever controls the sign start-up enable/disable the func_brush with your custom texture on it several times at varying intervals between the time the sign power-up sequence starts and the time the sign is fully on. It gives an effect along the lines of Valve's flickery sign boot-ups.
Your being too absolute lol. But not once did I see the word 'script' in the link. 
Maybe it should be "[TUTORIAL] Custom Chamber Signs (Without VScripts)" to stop confusion.
Now changed the title xD.
Well, its my own way to make custom test chamber because I tried one time to do it with vscripts and its so hard, so i tried to make it by another way and I did it 
In one future I will make some more tutorials for another things.
It's good to share knowledge with other people, especially things that you have had trouble with. Because there is a good chance that a lot of other people have had the same problem.
Forgot to say: Nice tut for a sign alternative
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