wireframe and margins

Thanks, I'm setting now the mai parameter, but it is not so intuitive how it
works with persp...

Sometimes specialized functions will coerce par options and one needs to work around of hack the code. I don't know if this is the case in this instance. I only gave a general bit of advice (which you then left out of the context) since you provided no example to work with.

David Winsemius
Alameda, CA, USA