Hi, i am preparing a model to prepare to CNC.
itll be sliced in 6mm to be stacked.
I sculpted the shape in Zbrush, imported Obj mesh to Rhino.
How do I thicken the wall and internal structure such as ribs? Since I cant keep the surface solid(I need to make it less heavy)
Cheers!
Use shrinkwrap with an internal offset.
to expand on what Scott said
see this video-
Hey Scott,
How can I keep the internal shell height the same as the outerone? when I use the shrinkwrap, it seems like the internal mesh gets smaller but also in z axis.
Hey Kyle
How can I keep the internal shell height the same as the outerone? when I use the shrinkwrap, it seems like the internal mesh gets smaller but also in z axis.
shrinkwrap it twice, offsetting the 2nd shrinkwrap - then edit the 2nd shrinkwrap that makes up the internal plug to poke out the ends of your part-
then shrinkwrap that again if necessary to make it a unified plug.
very generally like this-
Fantastic, thank you for the demonstration 
