Grasshopper preview issue because of extrusions?

martinsiegrist · March 24, 2026, 11:56pm

I have a new issue with preview in Grasshopper. Custom preview only works when I zoom in really close. Latest WIP and I installed a new driver too just an hour ago.

I see this in the commandline

It seems my meshes aren’t displayed properly.

I got rid of the latest WIP and reinstalled last weeks version. Everything displays normally.

It seems this has nothing to do with the WIP version. The issue just occured again.

The file is big and I could not yet replicate the issue with a smaller definition.

System Info

Rhino 9 SR0 2026-3-24 (Rhino WIP, 9.0.26083.12305, Git hash:master @ ec737798941d2609128508a1606b89c3a150899c)
License type: Commercial, build 2026-03-24
License details: Cloud Zoo
Expires on: 2026-05-08

Windows 11 (10.0.26200 SR0.0) or greater (Physical RAM: 128GB)
.NET 9.0.14

Computer platform: DESKTOP

Standard graphics configuration using DirectX
Primary display: NVIDIA RTX A5000 (NVidia) Memory: 24GB, Driver date: 3-17-2026 (M-D-Y). DirectX(11)
> 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.
None found.

DirectX Settings
Safe mode: Off

OpenBLAS: OpenBLAS 0.3.30 DYNAMIC_ARCH NO_AFFINITY Zen MAX_THREADS=64.

Rhino plugins that do not ship with Rhino

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 9 WIP\Plug-ins\Commands.rhp “Commands” 9.0.26083.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoBonusTools.rhp “Rhino Bonus Tools”
C:\Program Files\Rhino 9 WIP\Plug-ins\AnimationTools.rhp “AnimationTools”
C:\Program Files\Rhino 9 WIP\Plug-ins\UpdatesAndStatistics\UpdatesAndStatistics.rhp “UpdatesAndStatistics” 9.0.26083.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 9.0.26083.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoRender.rhp “Legacy Rhino Render”
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 9.0.26083.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\import_PLY.rhp “PLY - Polygon File Format Import”
C:\Program Files\Rhino 9 WIP\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 9 WIP\Plug-ins\import_STEP.rhp “STEP Import”
C:\Program Files\Rhino 9 WIP\Plug-ins\ShrinkWrap.rhp “ShrinkWrap” 9.0.26083.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\MeshCommands.rhp “MeshCommands” 9.0.26083.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\IronPython\RhinoDLR_Python.rhp “IronPython” 9.0.26083.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoCycles.rhp “RhinoCycles” 9.0.26083.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\Grasshopper\GrasshopperPlugin.rhp “Grasshopper” 9.0.26083.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 9 WIP\Plug-ins\Import_SolidWorks.rhp “Solidworks Import”
C:\Program Files\Rhino 9 WIP\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 9 WIP\Plug-ins\SectionTools.rhp “SectionTools”
C:\Program Files\Rhino 9 WIP\Plug-ins\import_OBJ.rhp “Import_OBJ” 9.0.26083.12305

martinsiegrist · March 31, 2026, 10:10am

@kike I think this preview issue is related to extrusions in blocks

A file with an extrusion makes the preview switch to wireframe. I’ve had situations where it just happened on one of two block instances.

Here’s a file with a brep and a mesh:

Below is my Grasshopper definition and four *.3dm files with different geometries.

brep_brep.3dm (67.6 KB)
brep_extrusion.3dm (54.3 KB)
brep_extrusion_mesh.3dm (158.0 KB)
brep_mesh.3dm (162.2 KB)
extrusions-in-block.-causing-preview-issues.gh (17.9 KB)

kike · March 31, 2026, 11:10am

Hi @martinsiegrist,

Thanks for reporting it will be fixed on next RC available today.

martinsiegrist · March 31, 2026, 11:58am

Thanks @kike

I’m now on the latest build (9.0.26084.12305) and I’m looking forward to a quick fix.

System Info

Rhino 9 SR0 2026-3-25 (Rhino WIP, 9.0.26084.12305, Git hash:master @ 90319a3baf21c85605c6c0166e6376839504696d)
License type: Commercial, build 2026-03-25
License details: Cloud Zoo
Expires on: 2026-05-09

Windows 11 (10.0.26200 SR0.0) or greater (Physical RAM: 128GB)
.NET 9.0.14

Computer platform: DESKTOP

Standard graphics configuration using DirectX
Primary display: NVIDIA RTX A5000 (NVidia) Memory: 24GB, Driver date: 3-17-2026 (M-D-Y). DirectX(11)
> 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.
None found.

DirectX Settings
Safe mode: Off

OpenBLAS: OpenBLAS 0.3.30 DYNAMIC_ARCH NO_AFFINITY Zen MAX_THREADS=64.

Rhino plugins that do not ship with Rhino

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 9 WIP\Plug-ins\Commands.rhp “Commands” 9.0.26084.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 9 WIP\Plug-ins\AnimationTools.rhp “AnimationTools”
C:\Program Files\Rhino 9 WIP\Plug-ins\UpdatesAndStatistics\UpdatesAndStatistics.rhp “UpdatesAndStatistics” 9.0.26084.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 9.0.26084.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 9.0.26084.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 9 WIP\Plug-ins\MeshCommands.rhp “MeshCommands” 9.0.26084.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\IronPython\RhinoDLR_Python.rhp “IronPython” 9.0.26084.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoCycles.rhp “RhinoCycles” 9.0.26084.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\Grasshopper\GrasshopperPlugin.rhp “Grasshopper” 9.0.26084.12305
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”

martinsiegrist · April 1, 2026, 8:02am

When will that be available?

wim · April 1, 2026, 9:56am

Hi Martin -

That will be next week.
(Unless we also run into something at that point…)
-wim

martinsiegrist · April 1, 2026, 10:06am

Thanks for the information

martinsiegrist · April 8, 2026, 8:11am

Latest WIP, meshes aren’t shaded. The normal preview component displays the mesh correctly. The new WIP version is still broken.

preview_issue_mesh.gh (10.3 KB)

System Info

Rhino 9 SR0 2026-4-7 (Rhino WIP, 9.0.26097.12305, Git hash:master @ b60dd410008243ac590db0c97997566b52def575)
License type: Commercial, build 2026-04-07
License details: Cloud Zoo
Expires on: 2026-05-22

Windows 11 (10.0.26200 SR0.0) or greater (Physical RAM: 128GB)
.NET 9.0.14

Computer platform: DESKTOP

Standard graphics configuration using DirectX
Primary display: NVIDIA RTX A5000 (NVidia) Memory: 24GB, Driver date: 3-17-2026 (M-D-Y). DirectX(11)
> 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.
None found.

DirectX Settings
Safe mode: Off

OpenBLAS: OpenBLAS 0.3.30 DYNAMIC_ARCH NO_AFFINITY Zen MAX_THREADS=64.

Rhino plugins that do not ship with Rhino

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 9 WIP\Plug-ins\Commands.rhp “Commands” 9.0.26097.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 9 WIP\Plug-ins\UpdatesAndStatistics\UpdatesAndStatistics.rhp “UpdatesAndStatistics” 9.0.26097.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 9.0.26097.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 9.0.26097.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 9 WIP\Plug-ins\MeshCommands.rhp “MeshCommands” 9.0.26097.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\IronPython\RhinoDLR_Python.rhp “IronPython” 9.0.26097.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoCycles.rhp “RhinoCycles” 9.0.26097.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\Grasshopper\GrasshopperPlugin.rhp “Grasshopper” 9.0.26097.12305
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”

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Grasshopper preview issue because of extrusions?

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