One of the dangers we run into during our productions has been object distortion. It’s most frequently seen when you fly towards or away from a moon or planet. That dreaded bulge is caused by the closest part of the sphere being much closer and therefore much larger than the farther parts of the surface. We have been actively trying to avoid these situations in our shows, as it tends to break the illusion of immersion. Sometimes, however, it is unavoidable, either through demand of the script or storyboards. It is in these cases that we try to make these close-to-camera actions happen as quickly as possible so as not let the mind start to think, “Boy, that really looks strange!”
Here’s an example I quickly threw together showing various distances.