I copied this test case over from the summer school, and adapted it to be compositional and nonconforming.
In 2D everything works great, but In 3D 8c42cc42 there is a runtime error with the geometry intersection (triggered from couplingmanager initialization).
(geometryintersection.hh:228) Geometry intersection detection with intersection computation not implemented for dimworld = 3, dim1 = 2, dim2 = 2
No pressure to actually use this. We just mentioned that it could be an option, and I figured I would copy it over before I'm gone for the rest of the week.