The following info was originally posted on the official Sports Interactive forums by TCSSkin who has a moderator role there, so it's definitely accurate.
A few things have changed in regards to custom graphics on Football Manager 26.
Player Faces:
These work fine. You do not need the icon files anymore, and they can cause issues with the note above. Delete them.
Newgen/Regen Faces:
You can assign faces to Newgen players. At present, there is no tool to export data from the game to any sort of format, making tools such as NewGan obsolete for the time being.
Club Logos:
These work fine, you may need to adjust your logo pack, the following sections are no longer required and may cause conflict and will need to be deleted.
Small, icon, left/back/right, @2x
Competitions Logos:
Work fine, same principle as above.
Nation Logos:
There is an issue with the small variants, previously the game had a 25x18 file that didn't stretch horizontally, in FM26 it does.
2D & 3D kits:
Apart from the issue mentioned at the start, these work fine
Backgrounds:
Not supported
Trophies:
Not used in game anymore
A few things have changed in regards to custom graphics on Football Manager 26.
SI will not provide any assistance for issues with custom graphics, please take any issues up with the creators of the pack.
Important Note:
FM26 cannot handle multiple files with the same name. For example, if you have two files with the name "kit.png", it will not load both. Every file must have a unique name.Player Faces:
These work fine. You do not need the icon files anymore, and they can cause issues with the note above. Delete them.
Newgen/Regen Faces:
You can assign faces to Newgen players. At present, there is no tool to export data from the game to any sort of format, making tools such as NewGan obsolete for the time being.
Club Logos:
These work fine, you may need to adjust your logo pack, the following sections are no longer required and may cause conflict and will need to be deleted.
Small, icon, left/back/right, @2x
Competitions Logos:
Work fine, same principle as above.
Nation Logos:
There is an issue with the small variants, previously the game had a 25x18 file that didn't stretch horizontally, in FM26 it does.
2D & 3D kits:
Apart from the issue mentioned at the start, these work fine
Backgrounds:
Not supported
Trophies:
Not used in game anymore
