Apple Shake 4 Tutorials - Manual (Page 137)

Tutorial 4 Working With Expressions 137
4 Using the onscreen controls, position the gradient shape in the upper-right corner,
then drag the middle ring to reduce the size of the RGrad.
5 Go to frame 75.
6 Using the following illustration as a guide, move the center of the gradient to create a
second position keyframe.
Now drag along the Time Bar to preview the dramatic animation. You’ll note that the
fan blades disappear after frame 5, somewhat reducing the realism of the scene! You
can fix this in the Time View.