Can't sub select mesh edge in Wireframe mode in Rhino 9 WIP

Rhino Rhino for Windows
1

Using ctrl+shift+LMB to select a mesh edge in Rhino 8 looks like this:

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image2062×989 79.2 KB

I get to choose from three options.

In Rhino 9 WIP I cannot select the edge and the face is selected and highlighted.

Is there a setting which keeps me from selecting the edge?

image
image1497×717 14.9 KB

System Info

Rhino 9 SR0 2025-5-20 (Rhino WIP, 9.0.25140.12305, Git hash:master @ d890ecce73c6f3a95029dec83812cb2b7774c990)
License type: Commercial, build 2025-05-20
License details: Cloud Zoo
Expires on: 2025-07-04

Windows 11 (10.0.26100 SR0.0) or greater (Physical RAM: 128GB)
.NET 9.0.5

Computer platform: DESKTOP

Standard graphics configuration on OpenGL
Primary display: NVIDIA RTX A5000 (NVidia) Memory: 24GB, Driver date: 5-12-2025 (M-D-Y). OpenGL(4.6.0 NVIDIA 573.24)
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port 0
- Secondary monitor attached to adapter port 1

Secondary graphics devices.
NVIDIA Quadro K2200 (NVidia) Memory: 4GB, Driver date: 5-12-2025 (M-D-Y).
> Accelerated graphics device with 4 adapter port(s)
- There are no monitors attached to this device!

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
GPU Tessellation is: On
Redraw scene when viewports are exposed: On
Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)

Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 5-12-2025
Driver Version: 32.0.15.7324
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 24564 MB

Rhino plugins that do not ship with Rhino
C:\Program Files\Rhino 9 WIP\Plug-ins\ConstraintsUI.rhp “Constraints UI” 9.0.25140.12305

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 9 WIP\Plug-ins\Commands.rhp “Commands” 9.0.25140.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 9.0.25140.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 9.0.25140.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 9 WIP\Plug-ins\ShrinkWrap.rhp “ShrinkWrap” 9.0.25140.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\MeshCommands.rhp “MeshCommands” 9.0.25140.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\IronPython\RhinoDLR_Python.rhp “IronPython” 9.0.25140.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoCycles.rhp “RhinoCycles” 9.0.25140.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\Grasshopper\GrasshopperPlugin.rhp “Grasshopper” 9.0.25140.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 9.0.25140.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 9 WIP\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 9 WIP\Plug-ins\SectionTools.rhp “SectionTools”

2

hi @martinsiegrist I cannot seem to reproduce that. In fact, in wireframe mode, I cannot select a mesh face with subobject selection (ctrl+shift) in either Rhino 8 or Wip.
Can you share that file or another that shows this behavior?

3

Ok, it might have to do with ngons…

The mesh on the left has no ngons and I can select in a normal way. On the right it does not work as expected.

Rhino 9 file:

mesh_ngon_subselect_problem.3dm (70.6 KB)

I copy pasted the content into Rhino 8.

4

@martinsiegrist what is the _SystemInfo of your Rhino 8 installation?

5
System Info

Rhino 8 SR21 2025-5-16 (Rhino 8, 8.21.25136.10001, Git hash:master @ e0a4b4942b1cfe680b2531b4879fa030194ff396)
License type: Commercial, build 2025-05-16
License details: Cloud Zoo

Windows 11 (10.0.26100 SR0.0) or greater (Physical RAM: 128GB)
.NET 8.0.16

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA RTX A5000 (NVidia) Memory: 24GB, Driver date: 5-12-2025 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 573.24
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port #0
- Secondary monitor attached to adapter port #1

Secondary graphics devices.
NVIDIA Quadro K2200 (NVidia) Memory: 4GB, Driver date: 5-12-2025 (M-D-Y).
> Accelerated graphics device with 4 adapter port(s)
- There are no monitors attached to this device!

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
GPU Tessellation is: On
Redraw scene when viewports are exposed: On
Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)

Anti-alias mode: 8x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 5-12-2025
Driver Version: 32.0.15.7324
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 24564 MB

Rhino plugins that do not ship with Rhino
C:\Users\martinsiegrist\AppData\Roaming\McNeel\Rhinoceros\packages\8.0\NVIDIADenoiser\0.4.3\NVIDIADenoiser.Windows.rhp “NVIDIADenoiser.Windows” 0.4.3.0

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.21.25136.10001
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.21.25136.10001
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.21.25136.10001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.21.25136.10001
C:\Program Files\Rhino 8\Plug-ins\IronPython\RhinoDLR_Python.rhp “IronPython” 8.21.25136.10001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.21.25136.10001
C:\Program Files\Rhino 8\Plug-ins\Grasshopper\GrasshopperPlugin.rhp “Grasshopper” 8.21.25136.10001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.21.25136.10001
C:\Program Files\Rhino 8\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 8\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 8\Plug-ins\SectionTools.rhp “SectionTools”

6

Hmm, interesting… I need to dig more. I see the buggy behavior in both Rhino 8.20 and latest WIP

7

I don’t need Rhino 8. All my work is in Rhino 9.

8

I’ll log it in a bit, for me it is important right now to find the source of this bug.

9

Sure thing! Thanks!!!

10

I’m really curious what you are doing differently. Here both 8.19-8.21 / WIP behave the same. Selecting on the Ngon mesh the first selection is always a face, only after that I get the selection menu like you are showing.
On the no N-gon mesh, the first selection is always an edge…

11

Are you in Wireframe mode?

I was concerned it would be my mesh but just came to the conclusion it has to be something else.

This new example I added a mesh box with 2 x 2 x 2 faces and ngons. Selection in wireframe mode is exactly the same. I can-t select edges.

image
image2137×1420 129 KB

mesh_ngon_subselect_problem.3dm (89.2 KB)

12

I am, yes. Default factory wireframe

13

I just want to get one thing clear as well: So when you select your first edge in Rhino 8, you get the selection menu right away?

14

Yes, one click in Rhino 8 and I see this:

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image2882×1555 206 KB

15

I’m so confused. I cannot get that, tried on 3 different computers.

16

In Rhino 9 if I switch off Object snap highlight I see no change. I still get the highlight.

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image1796×1254 104 KB

I can snap to vertices but not edges.

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image1978×1391 115 KB

17

You have Rhino.Options.General.MouseOverHighlightSubObjects off?

with that off, I get the menu right away, and I don’t see the issue

18

image
image1796×1009 37.7 KB

Don’t ask me why this was set to True?

I think you found the issue. Thanks so much!

19

I’ll have to give this another look tomorrow. On Mac it behaves differently in any case.