So quickly... I have a butterfly that I want animated. I have 3 layers, a body and the 2 wings. On the left wing I center the pivot about where the joint would be using the pan behind tool. I alt-click the rotation y and enter the expressions " wiggle(4,65) ". That works nice.
Now I need the right wing to follow. Obviously the wiggle command won't work because it is completely random and has no memory of where it has been or where it is going. So I alt-click the rotation y again and pickwhip the opposite wings rotation y. Now we have the exact same rotation except we need it to be inverted or opposite... so on the end of the expression, add " /-1 " which means divided by minus 1.
Working...
Add a little of that on the rotation z (I made it (5,6)) and turn on motion blur on the layers and also the comp and were done. It will do anyway for a background element.
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So, if I want to link a layer with an expression to another layer, but I want the layer in the expression to do the exact opposite, what would I type in the expression? For example, if the original layer moves up, but I want the layer connected to the expression to do the opposite and move down? Thanks!
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