Corrupted Textures DIY Rune Factory 4 Mods

[CutePoops]

I'm trying my hand at creating a texture mod for one of the characters, but the files I'm trying to use are all showing up corrupted.  I tried again, just doing an edit to Frey on the title screen to test, and I must be doing something wrong.

I extract the bundle with mbundleextractor, used massiveimporter to pull the texture file, edit the dds image in paint.net, use massiveimporter to pack it back into a texture file, remove the "new_", and place it in the bundle folder in my game installation.

I've used other similar mods with no issues.  It's specifically the ones I'm trying to make, so I'm clearly the problem here.  Am I missing a step? I've tried doing all of the steps but editing the image, and everything seemed to work fine.  I also tried converting the dds to png and back in order to edit in other programs, and that didn't help, either.

Any help would be greatly appreciated!

[RatGoatPigPossum]

Sorry if this reply is too late, but I was able to fix this after having the same issue!
I fixed it by changing the BC1 to BC7 and ensuring there are no mipmaps. Paint.net defaults to BC1 which I think causes the garbled textures.
Attached is the window that should come up when you save over the old .dds and the settings that fixed it for me.
Hope this helps you and/or anyone else who's looking for an answer!