BUG - section tool V8 (wip9)

Rhino Rhino for Windows
,
1

It may be already adresses elsewere but I’m still fighting whit tech drawing for product design:

Today issue is about hidden lines showed throu the section.

V8 not only hide hatches if there’s the solid option On but also shows hidden line even if the ShowSolid is ON:

ST_bug
ST_bug2560×1600 462 KB

And this the V9 that’s going better but still has issue with internal Tangent curves.:

ST_bug_2
ST_bug_21920×1200 461 KB

@rajaa I know: I’m always bother at you.
Is this smtg that could be adressed for V8 as well?

Thanks

20250304_ModelMania2020.3dm (3.9 MB)

2

Hi Riccardo -

When I copy - paste the object into a new Rhino 8 file and create new drawings, I’m not seeing those issues. Running (8.29.26033.22001, 2026-02-02).

image
image945×772 22.9 KB

I’ve put this issue on the list as RH-92065 ClippingDrawings: Unwanted Tangents
-wim

3

Thanks Wim,

I’ll wait for the update (probably today) to check it.

4

@wim,@rajaa, @Nikolay I’m here again because the problem is still happening to me and I think it may be related to V-Ray.

immagine
immagine1970×1270 240 KB

I’ve V-Ray installed on the system and when I open the file I get a ClippingPlane conflict alert:

immagine
immagine735×202 9.74 KB

My System Info V8

Rhino 8 SR29 2026-2-10 (Rhino 8, 8.29.26041.10001, Git hash:master @ 6f4761d87df45e886dd6b32508dff6a4c7e45f29)
License type: Commercial, build 2026-02-10
License details: Cloud Zoo

Windows 11 (10.0.22631 SR0.0) or greater (Physical RAM: 32GB)
.NET 8.0.19

Computer platform: LAPTOP - Plugged in [91% battery remaining]

Hybrid graphics configuration.
Primary display: Intel(R) UHD Graphics (Intel) Memory: 1GB, Driver date: 4-18-2023 (M-D-Y).

Integrated graphics device with 4 adapter port(s)

  • Windows Main Display is laptop’s integrated screen or built-in port
    Primary OpenGL: NVIDIA GeForce RTX 4070 Laptop GPU (NVidia) Memory: 8GB, Driver date: 3-13-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 551.88

Integrated accelerated graphics device with 4 adapter port(s)

  • Secondary monitor is laptop’s integrated screen or built-in port
  • Secondary monitor attached to adapter port #1

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: 3-13-2024
Driver Version: 31.0.15.5188
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 8188 MB

Rhino plugins that do not ship with Rhino
C:\Program Files\Enscape\Enscape.Rhino.Plugin-net48\Enscape.Rhino8.Plugin.dll “Enscape.Rhino8.Plugin” 4.15.0.276
C:\Users\gttrc\AppData\Roaming\McNeel\Rhinoceros\packages\8.0\NVIDIADenoiser\0.4.3\NVIDIADenoiser.Windows.rhp “NVIDIADenoiser.Windows” 0.4.3.0
C:\Program Files\Chaos Group\V-Ray\V-Ray for Rhinoceros\V8\VRayForRhino.rhp “V-Ray for Rhino”

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.29.26041.10001
C:\Program Files\Rhino 8\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.29.26041.10001
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.29.26041.10001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.29.26041.10001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.29.26041.10001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.29.26041.10001
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\Calc.rhp “Calc”
C:\Program Files\Rhino 8\Plug-ins\SectionTools.rhp “SectionTools”

Thanks

5

The partial solution is putting the view in shaded mode:

immagine
immagine1102×1066 35.4 KB

maybe the “solid Surface” on clipping drawings could be set as shaded by default?
But then the print must be raster loosing in quality.

6

Hi Riccardo -

Multiple things were reported in this thread, so you’ll need to be specific on this.
RH-92065 is still open…

The way to check that is to disable the plug-in, restart Rhino, and then check if the behavior has changed.

Personally, I don’t understand the reason to include a surface in the output. As you say, to be able to do anything sensible with that output, you’ll need to print to raster. Isn’t the whole point of creating 2D section geometry, to be able to print to vector?
You can always set the background color of the section hatch in the section style to some color if you need a fill behind the hatch pattern.
-wim