Thanks to kind explanations above I could successfully change backgrounds for each situation; briefing, pep talk, broadcast interview(in tunnel) and press conference.
But i'm still having hard times with some situations unchanged; tactical meeting, team selection, team news, broadcast interview(post match one) and team meeting.
Those are still remaining as 3D backgrounds.
How can I possibly change backgrounds of all?
please let me know codes for them.
Thanks in advance.