Someone made the outfits, and his crossbow ages ago, and let the mod dye off. You should revive it, and add it to your sword. I'd tpta;;y add them to my load list, I miss that old mod.
For a weapon infamous for its size, it's rather short. There is also JPG artifacting, which is a highly undesirable element to any sprite in a game that utilizes such. To that end, I took the time to correct it. What happens next is up to the author.
To put it in layman's terms, it's what happens when you save any image to JPG format at any quality percentages below 100%. I don't know how, or why, but the term involves putting in an awful lot of noise to the image, which you can very clearly see if there is a large enough area of the same color, which makes things such as sprites look absolutely awful if they have JPG artifacting. Although, it sounds like since you don't know the term, it could be that you also used a method of drawing that involved soft brushes, instead of actual pixel art. While soft brushes have been used in 2D games before, that is mostly only advisable when the sprites are of much larger resolution, which Starbound hardly does.
Nah I use Photoshop's Pencil brush. I think I know what you're talking about though, I added some 30-50% transparency pixels because the edges were looking a bit sharp to me in game