I don’t think it’s important. If you need scientific proof, then you don’t need faith. Besides, what Jesus looked like isn’t important either.
I don't entirely agree with that. His Incarnation was a real event, happened in the real world, he really walked around, ate, slept, preached, performed signs, was crucified, died, was buried, and rose from the dead.
He had a specific appearance, because He was really here. He was a man, not a woman; He was Jewish, not Chinese.
To say that what he looked like is unimportant could lead to suggesting that he wasn't real at all.
Bingo.