I'm looking for fully featured free 3D level editor for my game.
- It should output SCM friendly files (not the meshes and dds of course, just the transforms and such) that let me render it like I want (JSON for instance)
- It should be open source or free.
- Cross-platform is a must, Windows or Linux support a requirement.
Or, if such thing doesn't exist, some kind of library or tool to help me?