Now it works.
Wrong with the folders...sorry
thank you very much
carmelo

yes, I followed your instructions. The attached images show the folders located.
The error message comes up when the program starts.
Also, when I start the script, the window does not shows me any command.

tanks for reply.
there is another problem:

Errore di caricamento del file LiveIvy.rb
can't convert nil into String

hi...
i have this problem: "Errore di caricamento del file LiveIvy.rb
no such file to load -- LiveIvy/LiveVector_core"
Why?
tanks

@karlfucious said:

I usually export the shadows as a separate pass and then tweak them in photoshop to look sketchy. It seems to work pretty well. Here is an example for the Corinthian column I made a while back.

How do you export the shadows separately?

Thanks for letting me respond.
In fact I found these, but was looking for something free...
Tanks

hi all, this is my first post
There is a plugin to change the style of the shadows?
for example, do the shadows like charcoal or other style...
Thanks
Carmelo