I was watching Errand of Mercy this evening, and I couldn't help but notice that Kor and most of the other Klingons sported make-up that accentuated their forehead wrinkles.
This also seemed to be the case with Kang on Day of the Dove:
Now, both John Colicos and Michael Ansara had pronounced wrinkles, but were these accentuated? Were Klingons always supposed to have ridges?
Discuss!

This also seemed to be the case with Kang on Day of the Dove:

Now, both John Colicos and Michael Ansara had pronounced wrinkles, but were these accentuated? Were Klingons always supposed to have ridges?
Discuss!