Can you explain further with simplified terms?
These file extensions that I mentioned above are recognized 3D modeling formats, there are files within the game that can receive these new models being converted to the 3D file format of Fifa Mobile 16.
Friend, I haven't particularly the tested yet, but currently a lot of people seem to have already replaced stadiums with more updated/better 3D models... having the new model and the new texture, modifying the ID equivalent to the desired stadium.
The stadiums are like the 3D Faces of the players, you can change his file. Each has a corresponding ID. (ID=1 Old Trafford, ID=2 Santiago Bernabéu, ID=14 - Parc des Princes, 246=Etihad Stadium...).
Modifying the Parc des Princes (ID=14) stadium, it will stay like this:
com.ea.gp.fifaworld/data/sceneassets/crowdplacement/ "crowd_14_1.dat".
And the file .RX3, getting in:
com.ea.gp.fifaworld/data/sceneassets/stadium/ "stadium_14.rx3" and "stadium_14_1_textures.rx3".
I'm not sure, as I never changed it, but I believe it's these modifier files.
If you want to leave a specific stadium as fixed for all games, just go to the "product.ini" text block and create the line: "STADIUM_ID = 14", being this number to post it the ID of any default stadium in the game, varying I think between ID = 1 to 249.
@ramzidz15 , Yes. Look for the Dixii Zee... he's a great modifier! It has a special collection of Stadiums in Qatar converted for Fifa 16 mobile, including the one that will host the Final.