If you run the following script does the shading on the left hand look darker than the right hand?
Code:
import viz
viz.go()
rhand = viz.add('hand.cfg',pos=(0.1,1.8,0.5),euler=(0,-90,0))
lhand = viz.add('hand.cfg',pos=(-0.1,1.8,0.5),euler=(0,-90,0))
lhand.scale(-1,1,1)
lhand.enable(viz.FLIP_POLYGON_ORDER)
rhand.add(vizact.spin(0,0,1,45))
lhand.add(vizact.spin(0,0,-1,45))