And something to tell you about visible and not visible groups. There was such a group or groups in FIFA 13(dont know if FIFA 14 has) in which is recommended to be imported objects which are not visible during playing the game(roof for example). If I import something from lower stage of my stadium in this groups, I was not able to see it when I play, but I see it in replays. Also there was a groups which are for transparent objects(fences, glass, trees) amd for not transparent objects and if I import transparent object in group which are not for transparent object, even I use transparent texture there, in game this objects was not transparent. This was in FIFA 13. I hope that might to help!