Many people use two lide, top and bottom. The fit together back in the skull and rotate. All the rotation and where they come together can be behind the skull ( almost all ) to hide it. It is harder when you use oblong eyes, and whey you want the lids to touch perfectly to the eye. Good luck. ... plus, if your going for a single vertex that you add bones to, then you'll need to include the half-eyelids and use morph targets when you rotate the lids down, this might work well. R.

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