For ship artwork, if it’s a PNG and on a transparent background, then the background that will be provided by the system will be a starfield.
So, orthographic or perspective style artwork (without drop shadows) would probably fit best there.
For an example where the ship background doesn’t match the starfield, see http://swrpg.viluppo.net/transportation/starships/1686/
For an example where I did a really crude background cutout to transparent PNG, see http://swrpg.viluppo.net/transportation/starships/483/
I updated the graphics for the M3-A to use your image, see http://swrpg.viluppo.net/transportation/starships/1823/