QERadiant is FREE. It is based on the source code released by id software for QE4 (the editor they used to make Quake2). Do NOT send me or ask to send me money or compensation of any kind. If you have extra money laying around, give it to a good abused children's charity.
There are many versions of Radiant out there. It is very common that a company
would release the tools they used to make a game. That's how we have KPRadiant,
SoFRadiant, FAKKRadiant etc.
We are mainly providing support and looking forward to hear bug reports about
the main version we are working on, GtkRadiant. We don't have the resources nor the possibility to
support other versions. (NOTE: if we can direct you somewhere else for help on a
particular editor we can put links here)
Before you submit something, make sure you are on topic: the right editor
(latest version), and an editor related problem (a crash, misbehaviour, a
feature suggestion). We won't answer mapping questions like "how do I do a sky
shader" or "how does func_pendulum work". Try the FAQ to find links and
forums about mapping stuff.
The leading cause of radiant crashes is video card drivers. It doesn't matter
how new the drivers are, they can still have bugs in them that will crash
Radiant. Most of the time this is due to lack of full featured drivers. Radiant
uses much more of the OpenGL set than quake & derivatives of.
There is a bunch of resources you should read before reporting a bug, The better
the bug report, the most chances you have to see it solved in next release. Be
sure to read the FAQ Item about bug reports.
Please only use this form for bug reports you find within the latest version of
GtkRadiant. All submissions dealing with versions of GtkRadiant that are not the
current version will be ignored. Thank you.