Mesh holes

Rhino Rhino for Windows
1

I am having an issue where when I am trying to repair holes in this mesh after doing a boolean difference, and the fill all holes command fills in most of them, but not all of them, and when I try to do a mesh patch it doesn’t connect itself with the original mesh. Is there something that I am doing wrong when trying to combine them? Any suggestions would be very helpful.

Split up Kittypillar.3dm (1.8 MB)

2

patchsingleface

is a very useful command for fixing meshes, it allows you to break the holes up into more simple sections.

here is your mesh fixed -

Split up Kittypillar.3dm (1.6 MB)

and a video on techniques for this type of work-

3

if you want to fill organic meshes and are willing to do it outside rhino:
Meshmixer → Select (double click the boundary) → Fill (press F) …

image
image1792×1120 135 KB

image
image1792×1120 166 KB

there are other nice free mesh-edit software out there…

comment on PatchSingleFace:
somehow the name “patch” is linked to a smooth transition - which can only be reached by multiple faces.
feels a bit like a oxymoron.

would be nice if the function of PatchSingleFace is integrated into 3dFace

and would love to see a real “patch-Mesh” as discussed here:

2efb2a77d182422148e9372220755b59cb036b0f_2_1380x716
2efb2a77d182422148e9372220755b59cb036b0f_2_1380x7161380×716 358 KB

would be nice to see this functionality in rhino 9

@theoutside push it
@DanielPiker do it

;-D
??

kind regards - tom

4

yep, meshmixer is a very nice piece of kit… still free as well, I believe.

I have been asking for curvature base hole filling for sometime, I’ll keep ringing the bell.

5

The patch single holes has been working great, but it out of nowhere is destroying my model when I completely seal off all of the holes, did I do something wrong? And how do I fix it?

image
image1490×1330 208 KB

image
image540×1270 238 KB

6

Split up Kittypillar Sent for help.3dm (3.9 MB)

7

_UnifyMeshNormals

will fix this…

but still MeshRepair reports

This is a bad mesh.

Here is what is wrong with this mesh:
  Mesh has 1 non manifold edge.
  Skipping face direction check because of positive non manifold edge count.
  Mesh has 2 pairs of faces that intersect each other.
  This can cause problems if you're doing mesh boolean operations with it.
8

It did! thank you so much!

9

no sorry - see my edit

10

Split up Kittypillar_closed_by_tom_p.3dm (8.9 MB)

i deleted the selected faces.
a few
_bridge
then
_fillmeshhole

Screenshot 2025-10-03 at 01.13.51
Screenshot 2025-10-03 at 01.13.511338×1422 245 KB

11

So you deleted all of that highlighted area and did both of those steps?

12

yes.

you ll find the result in the 3dm i posted.

13

I tried it on another mesh I was having the same problem with, but when I go to hit enter nothing happens with the bridge command. Am I doing something wrong?

Split up Kittypillar Sent for help.3dm (10.1 MB)

14

Bridge is a bit fussy about it’s input.

click edge one, right click to accept, then click edge two and right click to accept, then the command will run (not this is a v8 and later feature if you have v7 or older use patchsingleface)

15

I did that, but it just doesn’t run, it resets itself to edge 2 and deselects the second edge I chose.

16

Did you delete ALL overlapping faces.
Use
Meshrepair check
Bridge and insertedge and some other newer tools hate meshes / subd s with defects.
The defect can be somewhere else…

17

So what do you recommend I do? I believe I got all the overlapping faces. I am lost I guess

18

When I split the initial mesh, the mesh was a good mesh, then I split the shrinkwrap of the mesh, and boolean difference them, the holes appear. when I fill all the holes, the mesh breaks, and when I do unify mesh normals, it does this to the part of the mesh that was initially a good mesh

image
image1124×858 62.3 KB