What does: Error. Plane with no normal m Created 11 years ago2013-03-19 17:18:46 UTC by ciba43

I am making a modification in Valve hammer editor. The compiler(ZHLT) outputs:
Error: plane with no normal
I want to know what that means and where to look for ZHLTProblems.html

Plane with no normal generally indicates a misaligned texture/face, usually caused by vertex manipulation. If a texture is not aligned to either world or face, it will output this error. (unless aligned with Alt+RMB) Look around for any faces with massively stretched or squished textures, especially around complex brushwork, and see if anything pops up in your error log (Map >Check for problems)

When you find it, you can either fix it straight from the error log, or you can align the texture "to world" or "to face" from the texture application menu.
If you HAVE vertex-manipulated the brush, make sure you don't have anything like this going on :Because that's 2 faces on one plane and hammer doesn't like that very much.

It also might result from vertex manipulating a cube into a wedge and not merging the vertices when they're overlapping.

thanks
I was using the xen crystal from decompiled maps. For the fastest way, I just made it myself.