Having been alive at the time, I can tell you that the effects were amazing then. B5 was one of the first shows to use computer graphics and partially-virtual sets. It wasn't limited by the number of times you could re-composite a handful of models together, so it showed whole armadas of ships. Windows didn't open onto a black felt field of stars but a green screen that allowed ships to pull up right outside the window.

The effects don't hold up to what has followed in the past quarter century, and they weren't preserved in a good resolution, so they'll never look very good on a high-resolution monitor instead of an old CRT. But, at the time, they were amazing.

If I remember right, the graphics in early episodes were rendered on commodore amigas