Unity 3D to STL

Is there any way to put a unity file into stl format?

I'm pretty certain, that you can't put a Unity file to STL format. And, to be honest, I wouldn't know what that could be used for. What would probably be more interesting is whether the STL format could be imported into Unity. I don't know much about STL but if there's a way to turn STL to FBX, that would work.

Not sure if it’s too late for this, but I’ve found an asset that might interest you: a STL exporter for Unity.

The External Lightmapping Tool (http://unity3d.com/support/resources/unity-extensions/external-lightmapping-tool)is able to export a Unity scene as FBX to 3ds max (where it can be lightmapped and imported back).

And 3ds max is able to save as .STL, so this is probably a way you could go.