Hi I think there’s a bug in the latest Rhino 8 update, I can’t extend trimmed surfaces.
It seems to work here.
Maybe post a file with a surface that fails to extend and your system info…
System Info
Rhino 8 SR13 2024-10-29 (Rhino 8, 8.13.24303.13001, Git hash:master @ 26babd47cc5f584ddff42ed6aa46cbe40122c540)
License type: Commercial, build 2024-10-29
License details: Cloud Zoo
Windows 11 (10.0.22631 SR0.0) or greater (Physical RAM: 128GB)
.NET 7.0.20
Computer platform: DESKTOP
Standard graphics configuration.
Primary display and OpenGL: NVIDIA RTX A5000 (NVidia) Memory: 24GB, Driver date: 7-23-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 560.76
> 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: 7-23-2024 (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: 7-23-2024
Driver Version: 32.0.15.6076
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\SolidTools.rhp “SolidTools”
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.13.24303.13001
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.13.24303.13001
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.13.24303.13001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.13.24303.13001
C:\Program Files\Rhino 8\Plug-ins\IronPython\RhinoDLR_Python.rhp “IronPython” 8.13.24303.13001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.13.24303.13001
C:\Program Files\Rhino 8\Plug-ins\Grasshopper\GrasshopperPlugin.rhp “Grasshopper” 8.13.24303.13001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.13.24303.13001
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”
Depending on the SR version of Rhino 8 you’re on, yes there’s issues (if you switch to release candidates for updates then at least that fixed it for me).