What are the requirements for supporting Collada/DAE models in SceneKit?

Question

I have received Collada (DAE) files from several different 3D authoring tools (Rhino, Blender, Cinema4D, etc) and have found that sometimes the models fail to load. Xcode do

Answer 1

Avoid Collada version 1.5 (as far as I know only Cinema4D exports to 1.5 by default but it has an option to export 1.4). Collada 1.5 is not supported by SceneKit. Then, in my experience with Maya and 3DSMax, the "openCollada" exporter (free plugin) gives better results than the built-in exporters.