If you stare at this long enough, you'll see a 3D picture...
As I understand the story which I've pieced together from various articles that had nothing to do with TMP- they wanted to do a big budget remake of a classic episode using updated visual effects. They narrowed it down to two episodes... The Changeling and Spock's Brain... however, they were going to modify it to be Shatner's hairpiece. However, the story was dropped because Harlan Ellison threatened to sue over the fact that he felt the story was too similar to his script for City on the Edge of Forever... in that it used the original crew of the Enterprise and on page 2 of the first treatment the word "time" was used twice. This was very upsetting for Shatner who'd always wanted to be filmed without his hairpiece, but was never allowed by his agent. He became very upset when TNG premiered with a captain who did not need to wear a hairpiece... So upset in fact, the he insisted that the character of Kirk die in Generations. He even refused to film his scenes with Patrick Stewart. So all the scenes of them were filmed separately and then edited together in post.
I think I need to add all this information to Wikipedia... as it doesn't appear to be there.
This is so full of win. :lol