This is a really simple trick that can add a lot of life to the facial expressions of an animated model, making the eyelids follow some of the movement of the eyeballs.
Following on from the previous recipes, open the Gidiosaurus_limits.blend
file:
Now zoom to the character's head and continue with the following steps:
Select the eyelid_upper.L bone and go to the Bone Constraints window; assign a Copy Rotation constraint.
In the Target field, select the rig item, and in the Bone field, select the eye.L bone item. Set Space = Pose Space to Pose Space.
Set the Influence slider value to 0.300.
Select the eyelid_bottom.L bone and...