Smile VDM brush (Vector Displacement Mesh) for Zbrush

I usually keep my models with a default expression because I don't want to model the mouth, position the teeth, etc..  So I thought, why not create a smile brush (VDM).  As a result, I can see instantly what the model looks like with a smile.

Tips:

-You want the surface to be pretty flat

-Increase your model's subdivision several times

-I have occasionally encountered artifacts on the outer regions of the brush, and this can be remedied by using the smooth brush - this usually occurs when I extend the brush size beyond the perimeters of the frontal plane/region.