Hi Kreten, I think it might be a bit difficult to add in parameters that reference specific world directions, since then the parameters become very specific to just one part instead of working in a general way on all objects. Like for instance if you rotated that model, you probably wouldn't expect the meshing to change, but it would if there was special attention being applied to "perpendicular to cplane" versus "parallel to cplane"...

But it also looks to me like the part that you want to get meshed more heavily has somewhat tighter curvature than the top part - isn't it already getting meshed with more polygons than the top part if you move the slider up a bit?

The slider controls an angle parameter, but it is an angle between surface normals, not between a world direction. But this should generally give denser meshing in areas with tighter curvature...

- Michael