I will just do like it is mend to resemble vanilla to comment on it
- even though you added shading to the sides it still is hard to guess its shape. try adding shading to the parts in the middle ,so the viewer can see whether those parts are higher or lower than there neighbours. if they ain't higher or lower i would say that the ship design is quiet flat...
- your earlier version was a lot brighter. i know you added shading to it which means it should get darker ,but to keep the white color ,i would recomment increasing luminositie (curve tool in paint.net). (ignore this comment if you want your ship to look grey.
- the laser part on the front (i guess it is an built-in laser) seems rather flat ,so do the green lines.
- at a closer look the green lines give light. you might wanna increase the light radius ,since it is not clear on normal zoom that they give light.
- you said the middle core was somekind of ai core. imo i would make it brighter or use some other way to make it catch the eye.
it is an important part of the ship ,so it should obviously attract the viewers attention.
- the frontal lights are a bit shaded away might wanna give them the same brightness. if the green parts are lgiht then they should also give light meaning they are not shaded like the other parts of the ship.
- the parts at the back seem a bit weird to me. i cant figure out what there 3d shape should be. might wanna give the viewer some more hints on that part.