People who build in Unity or UDK have immediate access to a 3D level editor. People who build their games in XNA or from scratch have no such thing. I'm looking for 3D level development tools available to these people.
- It must be free, or affordable to an indie developer. I leave the term "affordable" open to interpretation.
- It must not be restricted to a specific game engine. I should be able to build my game from scratch and use this level editor to construct my levels.
- It should have a file format that comes with an interpreter, or sufficient documentation for me to be able to build my own interpreter.
- Open source and/or modifiable/customisable is a plus, but not a requirement.
I know beggars can't always be choosers, but I'm hoping there's something high quality out there.
If there isn't, maybe someone would like to jump on that opportunity and fill the void.