How to properly save DDS texture files?

[MasterVampire]

I want to edit some .DDS texture files used in Skyrim.

In this example its just the colour of some tree leaves and branches.
But when I do this in either Photoshop or Paint.net in the game it looks all blocky and not properly 3D?

 

See here for what I mean:
http://imageshack.com/a/img32/5361/if1d.jpg

 

So how do I properly save the DDS file when Im done editing it?

 

[BruceWayne]

You need to edit the alpha channel, because by the looks of it that seems to be set to non-transparent. Just google "Skyrim transparency texture alpha channel" or something along those lines and you should get a link that explains this in more detail.