I like this idea, I recommend that you simplify the design on the characters armour, it seems that the sizes of the plates are too consistentright now, and it would help if there was a larger shape for the elbow plate or the shoulder plate, whichever one is more important for his or her job or mission. I also think you should limit the effects of the light source that is coming from the left some portions towards the right of the larger orb are lit in the rims, but if the side that is closer to the lights source is lit in the same way, then the portions toward the right side of the larger sphere should not have light hitting them. lighting the panels the way that you did seems to flatten the giant sphere rather than give the viewer the indication that these panels are placed on a spherical object. once agian, great idea, just think remove the lit sides that would be less intense.