misto tries spriting, also new trader portraits

[misto]

   

hello i have made small changes to the slamfire gun and made a held sprite for it which is basically a slightly modified riot shotgun sprite. i removed the riot shotgun's sling strap thing and decided to make the foregrip quite prominent in the sideways held sprite in an effort to make it visually distinct. the foregrip is very important since it is basically half of the firing mechanism. unfortunately, there is only so much you can do to make the forward and away-facing sprites distinct.

are these resources usable? do i need to convert them to a different filetype? do i need to put them onto a standardized naked spaceman sprite sheet?