I really need help.
Thanks
See if your Viewport is set to Wireframe in Rhino. If it is set to Rendered it won’t display any geometry.
It’s set to Wireframe but nothing happens
What’s that non-standard yellow icon on your toolbar? You have lots of plugins installed, any of them add any other uncommon functionality to standard GH?
That yellow icon is Brick Box plugin
it was working so much fine before with all these plugins installed , but today I opened it and found this problem out of nowhere
Dear,
I have the same problem.!
Rhino (6.13.19058.371, 02/27/2019)
GH (1.0.0007)
Rhino 6 SR13 2019-2-27 (Rhino 6, 6.13.19058.371, Git hash:master @ 17cd8b51accbe17dd04b48028f49d5e77a67f17b)
License type: Evaluation, compilação 2019-02-27
License details: Cloud Zoo. In use by: Savio Lima ()
Expires on: 2019-05-21
Windows 10.0 SR0.0 or greater (Physical RAM: 4Gb)
Machine name: DESKTOP-FN8154C
Non-hybrid graphics.
Primary display and OpenGL: NVIDIA GeForce 6800 XT (NVidia) Memory: 256MB, Driver date: 1-30-2015 (M-D-Y). OpenGL Ver: 2.1.2
OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Anti-alias mode: 8x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: Height
Vendor Name: NVIDIA Corporation
Render version: 2.1
Shading Language: 1.20 NVIDIA via Cg compiler
Driver Date: 1-30-2015
Driver Version: 9.18.13.908
Maximum Texture size: 4096 x 4096
Z-Buffer depth: 24 bits
Maximum Viewport size: 4096 x 4096
Total Video Memory: 256 MB
Rhino plugins
C:\Program Files\Rhino 6\Plug-ins\Commands.rhp “Commands” 6.13.19058.371
C:\Program Files\Rhino 6\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 6\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 6\Plug-ins\RhinoScript.rhp “RhinoScript”
C:\Program Files\Rhino 6\Plug-ins\IdleProcessor.rhp “IdleProcessor”
C:\Program Files\Rhino 6\Plug-ins\RhinoRender.rhp “Rhino Render”
C:\Program Files\Rhino 6\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 6.13.19058.371
C:\Program Files\Rhino 6\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 6\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 6\Plug-ins\Alerter.rhp “Alerter”
C:\Program Files\Rhino 6\Plug-ins\IronPython\RhinoDLR_Python.rhp “IronPython” 6.13.19058.371
C:\Program Files\Rhino 6\Plug-ins\RhinoCycles.rhp “RhinoCycles” 6.13.19058.371
C:\Program Files\Rhino 6\Plug-ins\Grasshopper\GrasshopperPlugin.rhp “Grasshopper” 6.13.19058.371
C:\Program Files\Rhino 6\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 6.13.19058.371
C:\Program Files\Rhino 6\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 6\Plug-ins\Displacement.rhp “Displacement”
Hi - it looks like you tried to attach an image to your post - that didn’t come through.
Please upload a gh file and the result of the Rhino SystemInfo command.
thanks
Not at my computer atm, but I faced this a lot with the latest SR. Will upload info as soon as I can.
But for example, preview works fine. I place a standard component. Preview disappears. I delete it and everything works fine again. Even when placing the same component again, it doesn’t happen again.
Couldn’t replicate it, just appears randomly over time with random components.
Usually when I have this problem it’s because I’m looking at grasshopper and rhino from two separate sessions. 
I know this, but wasn’t that case 
Hi, Wim.
Thanks.
Done.
Note that this is a very old GPU with an old driver and with a very old OpenGL version. A card that supports OpenGL 4.1 is recommended, I think the minimum is OpenGL 3.3.
Hello Nathan.
Thanks for attention.
It was what I did not want. Have to replace the video card … 
