Hi,
As for Extrude and Revolve mesher, i think it will be relevant for Sweep to be able to define a nlayers value (so that meshes remain coincident typically).
In a more general way, the edge discretization is sometime difficult to impose when using only the size elements; as in Gmsh, it might be powerfull to have such feature.
Propomax remains a very promising tool 
Paul
Currently, you can define the element size in the sweep direction using mesh refinement.
yes, but I’m saying that if we have the opportunity to define a “nlayer” parameter as for “Extrude” and “Revolved”, then we can have a better control on the discretization of each sub-volume prior to merge nodes i.e. gmsh “coherence” (see difficulties in this post )
Paul
Mesh refinement with number of elements per edge option (in addition to the current element size setting) would also help here: Mesh refinement of edges with gmsh
Agree on the principle with Jakub.
Just to illustrate it: i tried to get a “transfinite” mesh using a model found in the site but with no sucess.
nozzle_shell2.pmx (1.1 MB)
Try it with GMSH-shell and quasi-structured
that’s what i did with almost all options
ahhhhh … indeed 
Need to check the cad at each step
