Offset command producing weird lines after recent update (Rhino 8)

Rhino Rhino for Windows
,
1

Hello,
I’ve noticed this all day to day after I updated last night I believe. Offset produces weird lines that either don’t connect or that form a triangle at the corner. I haven’t changed any settings since updating and am wondering if there is a tolerance setting somewhere that I need to adjust after the update?
Here is an example of offsetting on the outside. The yellow line is the original, the new offset produces broken lines that don’t meet.

image
image1587×1368 34.9 KB

Here is an example of offsetting to the interior. The yellow line is the original rectangle. This produces triangles at the corner instead of right angles.

image
image1335×1285 7.07 KB

I’m hoping there is a quick and easy fix for this. Any help is greatly appreciated!
Thank you so much in advance!

2

Hi lila -

Please post the 3dm file so that we can make completely sure that we are looking at the same thing.

Which settings are you using the in the Offset command?

Also, please run the Rhino SystemInfo command and copy-paste its output here.
-wim

3

Hello,

Thank you in advance for your help Wim.

This is happening on all my rhino files. But here’s an export for you.

rhino issue export.3dm (33.7 KB)

Here are my offset settings. The only settings i change are usually cap being none or flat.

image

Here is a paste of my system info:
Rhino 8 SR32 2026-6-9 (Rhino 8, 8.32.26160.13001, Git hash:master @ 2804b73b0f4b4feba10cb8b0b07c18fce290de93)
License type: Commercial, build 2026-06-09
License details: Cloud Zoo

Windows 11 (10.0.26200 SR0.0) or greater (Physical RAM: 63GB)
.NET 8.0.19

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 5070 (NVidia) Memory: 12GB, Driver date: 4-23-2026 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 596.36

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.
[DISABLED] AMD Radeon™ Graphics (AMD) Memory: 1GB, Driver date: 6-19-2026 (M-D-Y).

Accelerated graphics device with 0 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: 4-23-2026
Driver Version: 32.0.15.9636
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:\Program Files\Chaos\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” 8.32.26160.13001
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.32.26160.13001
C:\Program Files\Rhino 8\Plug-ins\RhinoRender.rhp “Legacy Rhino Render”
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.32.26160.13001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.32.26160.13001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.32.26160.13001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.32.26160.13001
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”