Before MK9, Human Smoke wasn't esteemed up high by the developers – he hadn't got a playable 3D model nor unique moves – until the very end of Mortal Kombat 9's development wherein Smoke's origins may have been changed from "plainly Chinese" (after the nationality) to European. A rumor says that his hair would have been black and spiky originally. (See; Frost.)

Tomáš Vrbada's eyes are dark brown and the natural hair color is black. Surely it ends up white, as much as Sub-Zero's does in his MK:D alt, but in Smoke's MK9 alt the eyebrows are black with a hint of gray. The facial attributes such as the pale yellowish skin, his eyelids, dark eye color, thin, black eyebrows; the home place in Asia, the non-European fight yells and how the developers might have not initially intended to put a lot of effort in Tomáš all add to the theory that he is indeed a Mongoloid in his alternative costume of MK9. I believe that his ending made the developers realize what has to be changed because of the (what appeared to be) druids, who underwent their ritual, located in Europe only – in this case in the Kingdom of Bohemia most probably at the time – and since there was no officially European character yet, the European origins seemed like a rational bet.

The now retconned Chinese remains of this Lin Kuei make sense. You can examine him further in these cutscenes.

Smoke was the final normal/core character to be revealed for MK9 hence the drastic changes may have been made by the very end, and likely were. To clarify – by species he is an Enenra, by human body he was Asian yet now is Caucasian, by nationality he is Chinese; in the past he was an assassin for the Lin Kuei and now a slave having returned to the Hell.