Ok. Interesting fact :
I've just opened the
vanilla NSS_Uboat9d2.dat and replaced the 3D model of the hull by the new one from Soviet Type C.
With only this modification (
all files are from vanilla), I get a CTD while loading a mission with the type IXD2...
Original 3D model : 9262 triangles.
New 3D model : 40424 triangles.
Is this the problem ? Is there a hardcoded limitation for the number of triangles of the hull's 3D model ?
There are mods out there for SH3 which gives extremly detailed playable submarines (Ahnenerbe, Wise), so I just don't understand...