Paint Effects > Brush Animation > Bake Spring Animation
 
 
 

This lets you bake the expression for each frame in the specified range so the spring behavior will render properly.

Paint Effects > Brush Animation > Bake Spring Animation >

These are the options in the Bake Brush Spring Animations window.

Start Frame

Specify the first frame to be baked in the animation.

End Frame

Specify the last frame to be baked in the animation.