Divide domain surface error

[HS_Kim]

Check the link below…

Subsurface subdivision problem

This is one of the most recurrent question regarding subdivision with trimmed or untrimmed surface. See the link bellow to understand the underlying theory. And I can show you one workaround way on this using Copy Trim and Surface Morph. http://docs.mcneel.com/rhino/5/help/en-us/seealso/sak_splittrim.htm http://docs.mcneel.com/rhino/5/help/en-us/index.htm#commands/untrim.htm [Canvas%20at%2014%3B01%3B24] SubdivisionTrimmedSurface_re.gh (33.0 KB)

Lunchbox Triangular surface

See these threads. What you are dealing with is are trimmed surfaces. Trimmed surfaces are almost always evaluated by their untrimmed underlying Nurbs(4 point) surface, it is how Nurbs works. This isnt a Grasshopper knowledge issue, it is a Rhino knowledge issue. Check this: Rhino - Download - Rhino Level 2 Training Guide and Models http://v5.rhino3d.com/forum/topics/trimmed-versus-untrimmed-surfaces

Problem With LunchBox

You’d better understand how to deal with “Trimmed Surface” and it’s boundary first.