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The following text is a collection of Questions & Answers in relation to common error messages that occur during the process of compiling maps and levels with either Q3Map or the updated Q3Map2 for use in any game powered by the Quake 3 engine.
It was originally posted on the Quake3World level editing forums before the big f.u.b.a.r. of late 2004. Thanks to a forward thinking chap (thanks scourge34) a copy was saved and all was not lost..! It's an ongoing resource that has been gathered over a number of years by several helpful and dedicated individuals from the Quake3World community. It's not a complete list of all the possible error messages that might crop up, but a comment on the more frequent problems that arise from editing and creating content for games based on the Quake 3 engine.
What do -
"WARNING: models/mapobjects/kmlamp_white.tga has empty alpha channel"
"WARNING: brush plane with no normal"
mean?. I get a lot of each message in the console of radiant when loading my map. [vwperview]
A : First is harmless. Just means it doesn't have an alpha channel, which it doesn't NEED to have. The second is potentially more annoying. You have a brush with a f*cked up face which wont be shown. Vertex manipulation of the brush is likely to make it disappear and become a phantom brush, if it isn't already one. Brush cleanup will fix these. Alternatively, it could be a patch which you have manually rotated (NOT A GOOD IDEA), which is nasty, as you probably won't be able to see it in editor, but will show up in game. I (djbob) enhanced brush cleanup to sort these too. However, I never seem to have patched the changes.
To get rid of it, look through the map using notepad. If you see any patches which have co-ordinates that have a decimal point, round them manually. [djbob]