Its amazing how subtle an effect makeup has, here you can see Spiner going from cool looking to very creepy depending on the exact shade used for his skin. I love at 6min or so when they start fiddling with Rikers hair, Frakes seems very amused by it.
https://www.youtube.com/watch?v=_lvG0jm0B5Y
https://www.youtube.com/watch?v=_lvG0jm0B5Y