Thank you nallath, and sorry for my bad english, my fault.
There is the plugin named "skip infill" here http://wiki.ultimaker.com/CuraPlugin:_Skipinfill
that print to fill every "n" layer. so for example, I can print 0.1 but infill 0.2 it's ok?
it works with bottn and top layer also?
Is that plugin compatibile with cura 15.04.x ?
is it possibile to view a preview result?, because in preview if I use tha plugin the preview layer don't change
Excuse my bad english
Cristian