The Twilight Saga: Eclipse
In order to portray werewolf Jacob in The Twilight Saga: Eclipse, Taylor Lautner was forced to wear a "non-reflective grey outfit" while acting opposite co-star Kristen Stewart. According to the VFX team, this was done in order to "get the right kind of eye lines and motivation." Neither Stewart nor Lautner was thrilled about the arrangement.
The Chronicles of Narnia
Cutting-edge CGI brought Aslan, the magical talking lion in The Chronicles of Narnia franchise, to life. At first, the actors worked with a bust of Aslan's head while filming scenes opposite the jungle cat, but soon production realized that it wasn't working. Although the film was released over 15 years ago, the CGI is still shockingly good.