For modifying those icons, you're going to want to
extract all of the textures that start with "ief_". The one you show in your screenshot happens to be
ief_haste.tga.
Once you have those icons extracted, you'll pull each one into a program such as Photoshop or GIMP. If the image does not already have an alpha channel (which is what NWN uses to control GUI transparency), you'll want to add one.
The alpha channel is a greyscale image the same size as your full incon (32x32 pixels). Any pixels you want fully visible/solid will match up with white pixels in your alpha channel. Any pixels you want fully transparent should be black in the alpha channel. Shades of grey in the alpha channel will result in various levels of transparency in the icon.
Save your updated images as 32-bit .tga (Targa) files. Drop them into your NWN/override folder and enjoy.
I'm not sure which image controls the gold border around the effects icons. I know I made it tranparent in my GUI years ago, I just don't recall which file it is.
Modifié par The Amethyst Dragon, 17 octobre 2013 - 12:05 .