Rhino 8 UI Buggy, Lagging, and Crashes program

Rhino Rhino for Windows
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1

Hi Mcneel Support,

I’ve been using rhino 8 fine for the past few months, and only after coming back away from work I cannot use the program. Everytime I launch the program, i am able to rotate the viewport, type a command, drop a box, however the ui is extremely laggy. I hover over a layer and it does not highlight it. if i try to maximize it, the whole file crashes with no log. The worst case is trying to open it in safe mode which it does not even try to be stable, instant crash and close. below is my system info. Please help, i have fairly new hardware, and latest nvidia studio drivers.

Rhino 8 SR28 2026-2-10 (Rhino 8, 8.28.26041.11001, Git hash:master @ b7874a05a6982d0419fcc4f6009b510b48a09cb3)
License type: Educational Lab License, build 2026-02-10
License details: Cloud Zoo

Windows 11 (10.0.26200 SR0.0) or greater (Physical RAM: 126GB)
.NET Framework 4.8.9221.0

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 5070 Ti (NVidia) Memory: 16GB, Driver date: 12-30-2025 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 591.74
> 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.
AMD Radeon™ Graphics (AMD) Memory: 2GB, Driver date: 9-25-2025 (M-D-Y).
> Accelerated graphics device with 5 adapter port(s)
- There are no monitors attached to this device!

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
GPU Tessellation is: Off
Redraw scene when viewports are exposed: On
Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)

Anti-alias mode: None
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 12-30-2025
Driver Version: 32.0.15.9174
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 16303 MB

Rhino plugins that do not ship with Rhino

Rhino plugins that ship with Rhino
C:\\Program Files\\Rhino 8\\Plug-ins\\Commands.rhp	“Commands”	8.28.26041.11001
C:\\Program Files\\Rhino 8\\Plug-ins\\rdk.rhp	“Renderer Development Kit”	
C:\\Program Files\\Rhino 8\\Plug-ins\\RhinoRenderCycles.rhp	“Rhino Render”	8.28.26041.11001
C:\\Program Files\\Rhino 8\\Plug-ins\\rdk_etoui.rhp	“RDK_EtoUI”	8.28.26041.11001
C:\\Program Files\\Rhino 8\\Plug-ins\\NamedSnapshots.rhp	“Snapshots”	
C:\\Program Files\\Rhino 8\\Plug-ins\\MeshCommands.rhp	“MeshCommands”	8.28.26041.11001
C:\\Program Files\\Rhino 8\\Plug-ins\\RhinoCycles.rhp	“RhinoCycles”	8.28.26041.11001
C:\\Program Files\\Rhino 8\\Plug-ins\\Toolbars\\Toolbars.rhp	“Toolbars”	8.28.26041.11001
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”
2

I would try reinstalling your GPU drivers. When you do make sure you select the clean installation option through custom installation.

Windows updates are known to mess with GPU drivers.

3

thank you jesterking, I am also a big fan of your import to blender plugin for rhino thank you for that.

I ended up messing around a bit more and got my ui to return to normal, the only thing was possibly causing this issue was other programs running in my app tray. a friend of mine thought possibly an app was doing an overlay causing some ui issues. it has since been resolved after closing most items. the only odd part is i am unable recreate this issue now, even though it was presistent for the last 6 hours

4

Indeed such apps with overlays also can cause this type of issue. Good that it got resolved!

And I am glad to hear that you like my importer!