The long view on Ressik was originally a matte painting (see here) created by Visual Effects Producer Dan Curry. (Star Trek: The Magazine Volume 1, Issue 3, p. 19) For the 2012 remastered version of the episode the view was recreated digitally by Max Gabl, staying as close to the original as possible. As to the reasons for doing so, Gabl has explained, "I think most of them are total recreations. Because the planets we’re looking at from the original [TNG] series are very low-res and blurry. There’s no way to put more detail into those, so it’s basically all recreation. Mike Okuda tells us exactly what we need in there, and it’s just back and forth – playing it and seeing what the details are going to look like and then I put them in, compare with the old, [Mike will] look at it, I’ll make the changes and that’s how it goes."