Lightwave 10 is supposed to have a pretty good DAE exporter. For some reason, though, KSP doesn't like the files it makes. When the game loads, I get a purple silhouette of what I presume is my object, and the loading message just keeps flashing. I assume the game has crashed, because it can't progress beyond that point. Even taking a DAE file that comes with the game, and then exporting it back, breaks it. EDIT: Just spotted the SDK download. Trying that results in 'KeyNotFoundException: The given key was not present in the directory' POSSIBLE SOLUTION: Using Ultimate Unwrap 3D's COLLADA exporter seems to do the trick. Stupid Lightwave.