Creating a tiling mesh with ZBrush

__I need a rock stair in my scene, and it is tile rock surface. So if i want to sculpt it with ZB, how to do? 

我需要一個石頭階梯在我的場景裡，並且它是4方連續的石頭表面。如果我要在ZB雕刻這階梯，該如何做?

__GO to  Brush -> Curve -> WrapMode     (3Q ZB!!)

I also find this bradhb3d' s tutorial 

https://www.youtube.com/watch?v=e04k4Cz8UBo  

enjoy it !