[THEBERBSTER]

Hi ks

Ran naval academy mission navigation. No the problem didn't appear, graphics were as normal.

The fact that your naval academy is working properly shows that your game is running perfectly.

Does Silent Hunter III have a problem with windows 10 or later GPU's perhaps?

Two separate things here Windows 10 and your GPU.

Yes, SH3 does not like OS10 and SH3 should be run in compatibilty mode for Windows 7.
Your GPU needs to have certain settings which will be compatible with any SH version not just SH3.
Post #7 Changing Nvidia And AMD Radeon GPU Settings
Your applications should also be run as administrators.

Your problem lies with your enabled mods or a mod that is in not compatible with another mod.
When enabling your mods check which files are being over written.
Any grayed out mod is being overwritten by at least one other mod.
This should not be difficult as your problem appears to be something that is changing the graphics in your game.

What mods are you using?
Post #9 JSGME How To Export Your Mod List To A Subsim Post
Peter