BUG: Zebra View

[sach]

Hi there,

There seems to be s strange artefact of the underlying object showing up through the zebra analysis shader. When I zoom or rotate around the view, the underlying object stays in the same position. I have created and attached this object to show it.

It does not show up when I make a view capture image of it – using the Rhino command – but does show up using system print screen (I’m on windows). I’ve attached some images, the .3dm file and system info.

Thanks,

System print screen:

System print screen:

Rhino Viewport Capture Command:

Zebra analysis bug.3dm (252.8 KB)

System Info

Rhino 9 SR0 2025-11-25 (Rhino WIP, 9.0.25329.12305, Git hash:master @ 94aabd9816971918af23c4e9a3978c27952e558c)
License type: Commercial, build 2025-11-25
License details: Cloud Zoo
Expires on: 2026-01-09

Windows 11 (10.0.26200 SR0.0) or greater (Physical RAM: 32GB)
.NET 9.0.11

Computer platform: LAPTOP - Plugged in [73% battery remaining]

Hybrid graphics configuration using DirectX
Primary display: NVIDIA RTX A1000 Laptop GPU (NVidia) Memory: 4GB, Driver date: 10-29-2025 (M-D-Y).

Integrated accelerated graphics device (shares primary device ports)

• Laptop’s primary display device

Secondary graphics devices.
Intel(R) Iris(R) Xe Graphics (Intel) Memory: 2GB, Driver date: 9-16-2025 (M-D-Y).

Integrated graphics device with 4 adapter port(s)

• Windows Main Display is laptop’s integrated screen or built-in port

DirectX Settings
Safe mode: Off

OpenBLAS: OpenBLAS 0.3.29 DYNAMIC_ARCH NO_AFFINITY Haswell MAX_THREADS=64.

Rhino plugins that do not ship with Rhino
C:\Program Files\Common Files\McNeel\Rhinoceros\7.0\Plug-ins\KeyShotRhinoPlugin (78243fe3-17a0-4865-b713-88b4c224c48c)\1.5.0.0\KeyShotRhinoPlugin\KeyShotRhinoPlugin.rhp “KeyShotRhinoPlugin” 1.0.0.0

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 9 WIP\Plug-ins\Commands.rhp “Commands” 9.0.25329.12305
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” 9.0.25329.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 9.0.25329.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 9.0.25329.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 9 WIP\Plug-ins\MeshCommands.rhp “MeshCommands” 9.0.25329.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoCycles.rhp “RhinoCycles” 9.0.25329.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 9.0.25329.12305
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\Calc.rhp “Calc”
C:\Program Files\Rhino 9 WIP\Plug-ins\SectionTools.rhp “SectionTools”

[sach]

Hi @wim

Any idea about this ?

Thanks

[AlanMattano (Soaring Stars lab)]

Observe the position and rotation of your camera, for example. Try saving the camera’s position and including it in the file.

@sach

the underlying object stays in the same position

Yes, It appears that the object’s shadow is fixed (no rotation). It has the shape of a rounded cube.

[JimCarruthers]

I saw some wackiness in directX in the latest build, had to switch back to OpenGL, probably the same thing…

[AlanMattano (Soaring Stars lab)]

@JimCarruthers

in directX… to OpenGL

[AlanMattano (Soaring Stars lab)]

To reproduce the issue in Rhino9 WIP beta (9.0.25329.12305, 2025-11-25)
(Windows, Perspective view, default DirectX 3D mode):

1. Switch to Artic view mode with Zebra shading enabled.

2. Switch to Wireframe view mode.

3. Zoom in.

The glitch then appears.