Re: add surface pattern by varying extrusion rate on the perimeters
+1, but these sound like two different features to me. The texture feature could be implemented as a generated feature (take this model and just add a texture to it), but the vase example would have to give you some other way to model the feature you want to add - maybe that would be specifying a second model which is placed coincidentally with the first, but only has an outer skin and only on places where you want the embellishment. So in this case it would be a rose pattern surface in the shape of the vase?
