Rhino surface tolerance

Can anybody explain how manage this: after joining two surfaces tolerance changes like I show on this images:



Read here:
http://discourse.mcneel.com/t/jagged-curved-edges-help-plz/20199

It should be done by tolerance settings in project settings, but it is not enough… I use Rhino for Mac. Cann’t say much about Windows version but may be it is the same. I’m new in Rhino, I just start to learn it and need some help also.

All important’s
http://www.hydraulicdesign.net/meshes.htm
http://wiki.mcneel.com/rhino/meshfaq
http://wiki.mcneel.com/rhino/meshfaqdetails
O

Thanks so much - I have find per object mesh display setting and now understand how it works

Ok, a lot of fun while modeling :wink: