What really impressed me, that the sculpture of Dukat looks so fantastic in all its three-dimensionality (what I can see). I mean although tv- screens and images can simulate three dimension there have actually only two. Great job. Did you use a kind of substructure/base structure like gypsum orstyrofoam?
Awesome. I love how well all of the textures work, from the bony exoskeletal brow and neck ridges, to the rough, thick skin and the wrinkles around the eyes.
The likeness is great, but I really like how you get his personality across. The kinda calmly tyrannical look in his eyes and the way his mouth, even in a calm, relaxed expression like this holds the hint of condescension.
As to the eyes - it takes a lot of practice, patience, steady hands and good tools.
Aside from that I find that a blackened hole works very nicely as a pupil (I use mechanical pencil to make it). Also the iris needs to be crinkly but with clear edges which look even better when accentuated with slightly darker shade of clay. I shape the details with a sharpened wooden skewer (you can get a nice one from an ice-cream stick ) which I carved with my knife into a very useful tool.
I'm considering making a tutorial when I find some spare time.
I used plain modeling clay which probably wasn't such a great idea since it stays soft and requires very careful handling . But I like that I don't need to hurry while working and I'm quite used to it by now. Moreover I haven't found anything better so far.
(BTW, thanks for noticing the broken link. I put a clickable thumbnail straight into the description.)
Was just looking at the pencil drawing, i can't help but quote what Palome-Omi said: "There's always something striking about Dukat's eyes, and you brought it through here." Interestingly those same eyes really stand out here, amazing detail, especially for a 10 cm sculpture.