How can I extrude an existing mesh with GENA?

[Mike Wuetherick]

This feels like such a simple thing, but I can't find any information about how to do it. 

I have an existing mesh for a wall that I want to extrude along a spline. How do I do this with GeNA? I want to morph the mesh and have it follow the spline, tiling etc the mesh along the path. 

This feels like it should be very simple but I'm at a loss.
 

[Bryan]

We actually have an extrusion asset for this purpose. 
https://assetstore.unity.com/packages/tools/utilities/extrusion-pro-for-gena-pro-226115