fight me.

and also regarding shape and depth, the coolest robo heads I have ever seen have at least, idk, 4 different forms of depth. They have metal that juts out, obviously the shaded sides of metal that makes it 3d, another layer that forms as in indent on the face, and really dark parts that are seen to fall into the head.

Make more detail with wires and cool glass panels or something.
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overall really clean sharp lines helps a bunch. but obviously you aren't done with the head. I am sure you will polish it nicely.