I wouldn't know as this hull only uses tga files, I tried to replace them with dds ones in the model of what you can find in the sen toku .dat (with the imbedded image) but it didn't work -> hull all black
then I erased the new nodes, pasted in (import .dat) the node for the tga files from an original 9xd2 . dat, and
to my surprise ! the textures worked in game !!!!
So now I know how textures are made, as well as Occlusion Maps (
http://www.subsim.com/radioroom/showthread.php?t=136354 Rodan54

)
and apart from the weird green lines, it looks ok to me. I still have to fix the torpedo tube doors though, and a certain sinking propency... oh ! and the fact that on all the movies/pictures I've seen so far (black n white) the subs appear dark, but hey, in sh4 even if you have a dark sub or a camouflaged one, the game doesn't take it into account !
The goal was to have a sub looking like the one in my signature, I removed the crane and the high radio mast (those ships were used as command HQ for some kind of wolfpack) as they would have been stowed away while underwater.