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Full Version: V4 beta Oct-17-2018 available now - SubD to NURBS conversion

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From: Frenchy Pilou (PILOU)
26 Feb 2019   [#262] In reply to [#261]
When you import it by SUbD inside Moi
then export it as obj you have a choice to 67 000 (mini) to 2 000 000 polys (maxi) ;)
From: Michael Gibson
26 Feb 2019   [#263] In reply to [#258]
Hi Lordfox,

re:
> But one Polygon-Object I cant load with the SubD Tool. I dont know why, its very simple, no holes,
> only quads (754 Vertices) ... hmmm I dont know .... created in Silo 2.5.5.

It's because there are errors in the mesh structure, some degenerate faces and some faces with inconsistent normal directions.

The Rhino check command says:
quote:

This is a bad mesh.

Here is what is wrong with this mesh:
Mesh has 4 degenerate faces.

Important things to consider with this mesh:
Mesh has 128 faces with directions different from the mesh as a whole. Although this does not
necessarily mean that the mesh is bad, it can cause problems if you're doing mesh boolean operations with it.
Mesh has 4 pairs of faces that intersect each other. Although this does not
necessarily mean that the mesh is bad, it can cause problems if you're doing mesh boolean operations with it.


You may be able to fix it by using the "unify normals" tool in Silo:
https://nevercenter.com/silo3d/wiki/index.php?title=Unify_Normals

In the next v4 beta which should be released just later today, the sub-d conversion will skip over the problematic faces and give this result:



- Michael

Image Attachments:
lordfox_subd_import.jpg 


From: Lordfox
27 Feb 2019   [#264]
Thanx ;) - so its a problem of silo, wrong faced polygons in silo sometimes black and I see it and I fix it, but in somtimes my silo-object looks clean and the wrong polygon(s) are not "black" in silo.
I will set a wacom key, that makes all faces unify and after this a save.

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