Why catmull-clark invalid mesh

Grasshopper
1

Hi, All
I have a problem that need your professionals give me some explaination.
I have a texture like below

image
image1418×693 129 KB

When I use Catmull clark to smooth mesh, it works well
image
image1418×693 120 KB

But when I use sporph to map on this double curved surface, it cannot generate a valide mesh.
image
image1418×693 123 KB

image
image1581×632 156 KB

Is there some limit for catmull-clark?
Thanks in advance for those who can help to answer my question :smiley: !

2

Hello
there are more invalid mesh than with old Rhino version. Use some tools to clean the mesh and bad faces (no surface), edges (no length) or others problems (a quad that is a triangle => 2 coincident points…) will be removed and mesh will be valid.
Pufferfish has a component for that.

3

Thanks Laurent !
I will try your suggestions :grinning_face_with_smiling_eyes:

4

Rebuild Mesh component in Pufferfish (most usually weld input)

5

Thank you Michael !