I have come to Carrara after a great deal of time with Poser, and love what the program can do (but would love cloth sim).

My problem is that I cannot get a fractal noise displacement to work with a vertex object.  Maybe I am missing something, but the program just locks up and won't even preview it.

I am modelling a simple lathed goblet (Carrara Pro 6.2 btw) as a vertex object.  I make it with a brass texture and the add fractal noise to displacement channel in material room.  No preview any more, and attmpts to render lead to a little box saying "error".  yet if I make the same goblet as a spline the exact same sequence renders very well.  But I cannot make a spline goblet that looks as decent as a vertex one, so this is very annoying,

Am I doing something silly here, or is it a bug?