NEW VIDEO: ZERG DRONE PROGRESSION
The Zerg Drone as its model progressed for Warcraft vs Starcraft
To get a bit of shine on the wings of the Drone, we layered an additive-blended texture above the wings, and as the wings of the Drone moved we animated the texture's opacity by hand to create a simulation of sorts of specular mapping. Though this is no substitute for the real thing, at the very least makes the Drones look more interesting as they move across the map.
At first getting the keyframing to work with this was a bit tricky, but after a while you get the hang of it.