Beautiful work :) The light direction seems to be hitting the model at one angle, and the specular looks like it's catching it at another. Could flipping the y in the normal map be the solution?
i'd recommend a rollermouse. edit: this image shows the mechanism better. you can move the black bar sideways for X-wise movement, and roll it to move in Y.
It's just a shadow problem with the dynamic lighting in UDK. This is the problem I'm facing and... ... it's not a swizzle error, my normal maps in UDK are correctly set for X+ Y- Z+.
excellente RETOPO, how dou you realize? by hand in 3dcoat, maya, topo, etc? or with help of something like zremesher , y dont think this is zremesher at all