just as a test, if you switch rendering from GPU to CPU, do the previews render?
Do not upgrade to Windows 11! It consumes nearly twice as mush resources than Windows 10 and you will experience noticeable slowdowns, especially on older systems that were manufactured 5-10 years ago.
@Gijs Yes, the issue started with the latest update ā it never happened before. Switching the render from GPU to CPU is not the problem. The real issue is that, on the PC Iām currently working on, the drivers cannot be updated. From what Iāve seen, Windows 10 will eventually stop providing driver updates altogether.
@Rhino_Bulgaria At this point I canāt do much ā Iād have to buy a new PC, since this one doesnāt meet the required specifications.
I just wanted to make sure if the previews render when switching to CPU, to know for sure that it is a GPU or driver issue.
switch @Gijs
@brvdln sorry I should have been more specific. In your first videos, I noticed that your rendering previews (Raytraced previews of the materials) are not working. For this I wanted to check switching to CPU makes a difference. For Rendered display it wonāt make any difference.
ok, so to make sure: if you switch to CPU mode in Render settings, these previews still stay black?
yes
hmm, I think you need to wiggle the size of the previews to force a re-render. It might still think it is ādoneā.
So switch to CPU, close the dialog and change the size or a material property.
Iām trying, but itās not working.
Hi
Try reinstalling Rhino, but click on āRepairā; most likely, the problem will be solved. I faced the same issue a while ago and it was fixed this way.
@RedAlert Ok thanks, Iāll try again after the next Rhino 9 update. If it doesnāt fixā¦ where exactly is the āRepairā option?
When you double-click on the installation exe file, it will give you 3 options, if I remember correctly. One of them is āRepairā, which should keep your settings intact. The others should be āUninstallā and āInstallā (may erase your settings).
I noticed this warning triangle in the bottom left ā could it be related to the issue? @Gijs
Looks like a missing material or an environment map.
@Gijs I just updated Rhino WIP, everything seems fine now.
Just a reminder that this nasty bug which I reported for Rhino 7 in the past is still not resolved in the latest Rhino 9 WIP. 
The mouse tooltips activate for no reason.
Also, there is a noticeable lag of the mouse tooltips when they try to follow the mouse pointer.
If I move the mouse pointer over the toolbars, the mouse tooltip freezes at the end of the viewport and stays there even if I hover the mouse over the icons to show their own tooltip.
The framerate during āShadeā significantly drops on my PC, no matter if I use DirectX or OpenGL. Since I use a 3d mouse, I can really feel the slowdown and the lag when I rotate the camera. Itās blazing fast when I exit āShadeā. Note that this is not an isolated behaviour of Rhino 9 WIP. The same issue is present in Rhino 7, as well.
System information
Rhino 9 SR0 2026-5-19 (Rhino WIP, 9.0.26139.16215, Git hash:master @ 407d139233ed2befbc62e441641abf700f8532f3)
License type: Commercial, build 2026-05-19
License details: Cloud Zoo
Expires on: 2026-07-03
Windows 10 (10.0.19045 SR0.0) or greater (Physical RAM: 16GB)
.NET 10.0.2
Computer platform: DESKTOP
Standard graphics configuration using OpenGL
Primary display: NVIDIA GeForce GTX 1660 Ti (NVidia) Memory: 6GB, Driver date: 5-5-2026 (M-D-Y). OpenGL(4.6.0 NVIDIA 596.49)
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port #0
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 GPUās 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: 5-5-2026
Driver Version: 32.0.15.9649
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 6 GB
OpenBLAS: OpenBLAS 0.3.30 DYNAMIC_ARCH NO_AFFINITY Haswell 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 āCommandsā 9.0.26139.16215
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk.rhp āRenderer Development Kitā
C:\Program Files\Rhino 9 WIP\Plug-ins\UpdatesAndStatistics\UpdatesAndStatistics.rhp āUpdatesAndStatisticsā 9.0.26139.16215
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoRenderCycles.rhp āRhino Renderā 9.0.26139.16215
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk_etoui.rhp āRDK_EtoUIā 9.0.26139.16215
C:\Program Files\Rhino 9 WIP\Plug-ins\NamedSnapshots.rhp āSnapshotsā
C:\Program Files\Rhino 9 WIP\Plug-ins\MeshCommands.rhp āMeshCommandsā 9.0.26139.16215
C:\Program Files\Rhino 9 WIP\Plug-ins\IronPython\RhinoDLR_Python.rhp āIronPythonā 9.0.26139.16215
C:\Program Files\Rhino 9 WIP\Plug-ins\3dxrhino.rhp ā3Dconnexion 3D Mouseā
C:\Program Files\Rhino 9 WIP\Plug-ins\Displacement.rhp āDisplacementā
C:\Program Files\Rhino 9 WIP\Plug-ins\SectionTools.rhp āSectionToolsā
I donāt see this. Latest WIP