I get this error in the debugging window:

brush 61
degenerate plane

1) What is this error?

2) How do I find brush 61?

3) How do I fix this?


Thanks in advance, :D

If you double-click the error message it should select the problem brush for you. I've never gotten a degenerate plane error but I have gotten a duplicate plane error and I usually get this when I do a little too much vertex editing on brushes.

Hope that helps.

To fix it you should remake that brush. Be very careful around vertex editing. Though it's much safer to use in Radiant than hammer, errors still pop up.

All good suggestions, but what exactly is a degenerate plane?

I'll try to explain according to my experience in HL:
If it's correct, ;)

A plane requires 3 vektors at different spots. It's required for a 3d picture to be drawn onto it. In other words: 3 vektors create an area on a brush.

With this degenerate plane you have made a brush where 3 vektors aren't on the same plane. And the vertex tool hasn't been able to fix it. It may sound strange what I write but once you found the area that's degenerate, look up this and you may understand better.