XnView Software

Win 10 x64 and XnView MP 0.79 x64

Asking just because I'm curious.
Why Dark theme is so special that unlike Fusion it needs style_sheet.qss and style_sheet_win.qss to be placed in main folder of XnView MP? Selection of Dark theme in menu just copies them there from UI folder and replaces all Windows newlines (CRLF) with Unix newlines (LF) in those files.

I Agree. I'm not sure why this is done, Something is deff different. 1 thing is for sure, Dark theme is really buggy.
Fist I thought, so we could customize it, but now I think it's another reason.

Where does fusion and dark fusion come from..

Why not have a themes folder:
-Default
-fusion
-Dark
-Dark fusion
-Dark fusion Custom

Then let us pick a folder to use as theme.
or have color options for parts of gui and font

dark theme is an old theme made before Fusion (since QT 5), i think that now we must use Fusion....