Hi, I hope you’re all safe and well.
I’m creating a model, and a newbie to Rhino. I have a problem with this face not closing/ or not joining in with the rest of SubD object. It’s so unusual because I have previous holes in other parts that I was able to patch and stitch properly, my favourite to use is Single SubD face for such job and then join.
However for this particular spot-- it always result in a darker black line border, and will NOT join. I tried several times and procedures, and I appreciate what you can share, I want to know the reason behind it. Why some will close easily and some act like there’s a bug or something. Many thanks for checking!
Attached screenshot and Rhino5 file
PS. in my screenshot I pressed the icon Toggle SubD display
Issue face Rh5.3dm (282.9 KB)
Rhino 5 doesn’t support SubD, please send your file as Rh7 file.
I think you just need to use the append tool.
Hi thank you for your response. I will check that video about append tool. Thanks for the time to put that together.
Sorry my bad about Rhino 5 file upload, I forgot that SubD is new feature. Meanwhile, though I wasn’t able to save the orig file in screenshot as is- just dropping here the version 7.
You can see me continued with filling the faces but still having that “bold border” outline which indicates they’re not joining with the rest of model. Thanks
Issue face Rh7.3dm (224.6 KB)
It doesn’t join because you have a tiny face … That face continues towards the right side… and needs to be deleted. It seems as if there’s something else wrong with your geometry since it just doesn’t want to join.
The big part has some vertices attached to it. Not sure how you created it but this part is problematic.
I put the other segment on a new layer and hit F10 to show the control points.
I was able to delete the points with the faces attached to them.
Here I’m using the Gumball to extrude new faces and then the Stitch tool to join the vertices on the gap.
There’s a copy of the starting object in the file attached.
Issue face Rh7.3dm (274.0 KB)
Running
_ExtractControlPolygon
shows some bad meshes:
deleting these 2 faces and re-creating the sub, solves the problem
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Hi guys thanks so much for your reply above, very helpful. I will try that. I can’t recall what led to those tiny face artifacts and stray points, could be some left over of attempts I tried on fixing it. I need to be watchful of the lines I put in during the build. Cheers! 
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Hi, I also have little background in 3dsMax- this part is similar to edit poly/ vertices mode in 3dsMax, here in Rhino, how where you able to delete the points? I tried to press F10, select the SubD ctrl points but nothing happens when I hit delete. Is there another command? Thanks
I selected faces attached to these problematic points.
Not sure what exactly the problem is with this SubD. I’ve been using T-Splines for a decade and SubD since it’s beginning and I have never seen such a problem.
While I don’t know your requirements, I think the topology of the whole shape could be improved.
Issue face Rh7_topo.3dm (294.3 KB)
Thank you all. I finally was able to do it. Yes maybe some bugs SubD being still new development. But I’m glad my object is finished… funny feeling like waking up from bad dream haha. That tiny spot yesterdat won’t let me pass.
Yes indeed looks good. It there a command for this or just have to manually drag until they flow nicely like continuous quads.
By the way is there a command in Rhino, similar to AutoCAD, “overkill” that simply removes all overlapping lines or at least change the display to show problematic lines, similar to Sketchup, it shows very bold likes if not connected in mesh.
I noticed I have several stray lines but not easily visible. I only see them when I test the display and see this pointed web like mesh. I go back to cage display mode and delete a line, viola something is overlapping indeed.
Thanks!
Overkill in AutoCAD doesn’t apply to your case, Overkill detects overlapping object and deletes them keeping only one element.
In Rhino you can use
selDup
selDupAll
Now all the above doesn’t apply to your case, there are a few commands to determine the validity of your projects:
Try:
check
This will give you a report of your objects
also:
selBadObjects
This will select any object that has errors in Topology.
