Best way to open/edit .FX files??

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Originally Posted by Targor Avelany

Working with uboat files, I found there are 2 types of .fx files in the game.

Okay, at this point I think there is an equivocation. Thank you Targor for pointing me to it

Originally Posted by Targor Avelany

1) are easily opened with a texteditor or can be imported into FX Composer (I believe TDW recommended this tool).

Yes, these ones are game shaders, and have nothing to do with the next ones, except their extension, indeed

Originally Posted by Targor Avelany

2) others - not even close. I'm still not sure how to edit them or open them.

This ones are dat (binary) files. They contain SH controllers, and they can be opened with Goblin Editor, by merging them with their corresponding dat/GR2 file