Hi,

I could create a VTK (or STL) based on extracting bezier.tri as connectivity to a set of vertices as follows:

bezier = domain.sample('bezier', 10)
points = bezier.eval(geom)
export.vtk(vtkpath, bezier.tri, points)

However, after exporting the generated geometry to a tool and observing the normal direction in each element, it shows that every alternative element has a inverted element orientation (see image below). I think this is not intentional and it would be better to rotate the orientation all to a direction.

For now, a simple fix is done using the following lines:

# Change element orientation
tri = bezier.tri.copy()
tri[1::2, 1] = bezier.tri[1::2, 2]
tri[1::2, 2] = bezier.tri[1::2, 1]