Clipping Plane Produces Inaccurate 2D Linework

Rhino Rhino for Windows
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1

I’ve looked for any solution to this and it seems like Rhino 8 has some issues with Clipping Plane or maybe I just don’t know how Rhino 8 works. I’m trying to produce basic architectural orthographic drawings. Since Rhino 6 my method has been to use a clipping plane, “cut” the section, make2d in a ortho view and then edit linework. I’m struggling with Rhino 8.

I’ve tried numerous ways to cut a section through this model. Originally I was trying to use the new feature of the Clipping Plane to ignore the building so it would cut only the step topographic model but it wasn’t working. Then I tried just cutting everything and I would manually draft the output but the output is inaccurate. You can see my Clipping Plane settings. The Right Viewport shows the intent but when creating linework using the command MAKE2D the output is something else. Is this a glitch or am I just not following the proper procedure in Rhino 8.

RhinoForums Collision Drawings 01.3dm (11.3 MB)

Clipping Plane 02 - Section Clipping Step Topo Only - Inaccurate
Clipping Plane 02 - Section Clipping Step Topo Only - Inaccurate1919×1027 211 KB

Clipping Plane 01 - Section Clipping All objects - Inaccurate
Clipping Plane 01 - Section Clipping All objects - Inaccurate1919×1028 213 KB

Rhino 8 SR25 2025-10-14 (Rhino 8, 8.25.25287.14001, Git hash:master @ 6cb5f028371cc144f33593b4e8884e14e4ebc7e9)
License type: Educational, build 2025-10-14
License details: Cloud Zoo

Windows 11 (10.0.26100 SR0.0) or greater (Physical RAM: 31GB)
.NET 8.0.14

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 5070 (NVidia) Memory: 12GB, Driver date: 10-9-2025 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 581.57

Accelerated graphics device with 4 adapter port(s)

  • Secondary monitor attached to adapter port 0
  • Windows Main Display attached to adapter port 1

Secondary graphics devices.
AMD Radeon™ Graphics (AMD) Memory: 1GB, Driver date: 12-24-2024 (M-D-Y).

Accelerated graphics device with 5 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: 10-9-2025
Driver Version: 32.0.15.8157
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 12227 MB

Rhino plugins that do not ship with Rhino
C:\Users\garci\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” 8.25.25287.14001
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.25.25287.14001
C:\Program Files\Rhino 8\Plug-ins\RhinoRender.rhp “Legacy Rhino Render”
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.25.25287.14001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.25.25287.14001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.25.25287.14001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.25.25287.14001
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”

Thanks for the help.

2 Likes
2

Hi Alberto -

Yes.
In Rhino 8, I see 5 curves that shouldn’t be created when the clipping plane clips all objects.
When the clipping plane excludes 80 objects, the result is rather sad. 70 curves (in red in the following image) shouldn’t be there and a whole lot are not drawn.

image
image1780×421 7.87 KB

When I tested this in the current Rhino 9 WIP, I’m not finding any mistakes:

image
image1787×427 2.85 KB

I can only recommend that you give the WIP a spin. When you do that, you can also take a look at the ClippingDrawings command as an alternative for Make2D.
-wim

1 Like
3

Hey Wim,

Thanks for the response. I’ll test out the ClippingDrawings command and hopefully it gives a more accurate drawing. I have a “problem” with using Rhino 9 WIP. I’m a teacher at a community college and it’s harder to get the IT Dept to install software mid semester. Another issue that I foresee is that when delivering the lessons you want the instructions to go smooth for the students that are following along. I have no experience with Rhino 9 WIP so I’m just assuming the worse but just a concern. I’ll try it at home and hopefully next semester it will get updated. Thanks for the help!

4

Hi Alberto -

Note that ClippingDrawings uses the same base functions for the calculations as Make2D, so that won’t give better results in Rhino 8.
-wim

1 Like