Controlling eyelids with expressions

Now let's take a look at a different way to connect attributes to a control panel.…We are going to be working with the character's eyelids and we are going to be…doing Blink controls.…We could very easily just use set-driven keys like we've done before, and that…may be the best way to do this, but we're going to do this using a technique…called expressions, so that way we can get our feet wet with expressions and then…use expressions in a more complex manner for some of the other controls.…So I am just trying to get our feet wet here so we can understand…how expressions work.…

So I have this control here and that's my lid top, and if I move that you'll see…it goes from 1.1 to -0.2 and that's how I've limited it.…So I am going to go ahead and set that to a basic value of 1.…And then I want to control my character's eyelids.…So I will just go-ahead and control the top left lid, so that is a Blend Shape.…So we go into our Blend Shape window here, and go in and find the…upper lid left.…

So that's the one that we want to control.…