Apple Shake 4 Tutorials - Manual (Page 154)

154 Tutorial 4 Working With Expressions
2 Insert a Brightness node and a Mult node from the Color tab, then set Brightness1 as the
active node in Parameters.
Both nodes should be between RBlur1 and Fog_Add. You’ll now create an expression to
take the animation values from Fade1, double them, then apply the result for the
Brightness1 value.
3 Enter this for the Brightness1.value parameter:
Fade1.value * 2