Simply export the scene content, one sphere geometry, and one skybox.
The sphere geometry are “converted” in to one mesh and a texture material are assigned to it.
The sphere are exported either as geometry and as mesh. This is because Away3D and also the AWD file data format works on this way.
The skybox are exported with all the needed texture image.
The texture image are the same you can find on the Away3d examples archive:
https://github.com/away3d/away3d-examples-fp11
To open the new file ( click on the view to save the file ) you can use AwayBuilder, Prefab or the utility that you can find here: