For my character to blink, it has two shape keys to control the upper lid.
Because relative shape keys can only follow a linear path, the lid will cut through the cornea of the character’s eyeball if only one shape key is used. That’s why I’m using two shape keys; the first shape key brings the eyelid down halfway, and the second key (when stacked onto the first key), brings the lid down all the way.
Key 2 stacked onto Key 1:
When I add single driver to control both shape keys, the driver still calculates the “Averaged value” of both shape keys, so the final transition is still really wonky.
I want the driver to calculate Key 1 when the driver bone is pulled halfway down, and then stack Key 2 onto Key 1 when the driver bone is pulled all the way down.
So when the driver bone is pulled halfway down, Key 1 has maximum effect but Key 2 has 0 effect. Then, when the driver bone is pulled all the way down, both Keys have maximum effect.
Are there any special driver settings that can achieve this effect? Thanks!!