I was wondering if there are any pictures of what the ship looked like in its prime prior to it crashing on the surface of Hoth because I always wonder whenever I see it.

Nope, no pictures, no descriptions, no technical specifications, nothing. All we get is a generic "superdreadnought" and "most advanced ship, designed and built to be the flagship of the Republic Navy". Worse, we can't even begin to guess what it might look like since we don't even know who built the Star; the same classification can have wildly different designs based on the company (and culture) that built it.

Here's an interesting

about it.

 

As for what it actually looked like, that ought to be anyone's guess.