In the original release of the Star Trek TOS episode "Space Seed", shots depicting the exterior of the Botany Bay only ever show it in profile, never revealing the true shape of the physical model. In the re-release, we get to see it from other angles. What was the basis of the CGI model? Was it faithful to the original physical model (do we even know)? Did the original physical model still exist to become the pattern? Was it captured from different angles in other media (other movies, production stills, etc.)?
I could extend the question to a few other ships featured on the show where you don't see them from enough angles to get a clear sense of their true shapes. I often wonder how faithful the CGI render of the Romulan "bird of prey" in TOS "Balance of Terror" re-release is to the original effects model.
The two big exceptions to my question are the Enterprise and the Klingon battle cruiser. In both cases, the original release effects shots covered them from enough angles, and both had model kits and other reasonably reliable sources (plans, etc.) issued during the show's original run.