Material thumbnails gone. Windows or Rhino problem?

I don’t often use materials so I just noticed this today when trying to apply a chrome to an object. First, none of the thumbnails are showing up like they used to. Secondly, render mode and ray traced give me the image.

503_sculpture.3dm (157.3 KB)

Rhino 6 SR30 2020-9-22 (Rhino 6, 6.30.20266.14531, Git hash:master @ 432e59522db39738e3c04ffb3cb6535f118b6df2)
License type: Commercial, build 2020-09-22
License details: Cloud Zoo. In use by:

Windows 10.0 SR0.0 or greater (Physical RAM: 16Gb)
Machine name: FRAGBOX-2-DSKTP

Non-hybrid graphics.
Primary display and OpenGL: NVIDIA GeForce GTX 1060 6GB (NVidia) Memory: 6GB, Driver date: 7-13-2020 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 451.77

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On

Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: Height

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 7-13-2020
Driver Version:
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 6 GB

Rhino plugins
C:\Program Files\Rhino 6\Plug-ins\Commands.rhp “Commands” 6.30.20266.14531
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\RhinoBonusTools.rhp “Rhino Bonus Tools”
C:\Program Files\Common Files\McNeel\Rhinoceros\6.0\Plug-ins\ColorPicker (336da4ab-03d3-42ca-b1fb-313bfd4c1157)\2019.2.15.811\ColorPicker.rhp “ColorPicker”
C:\Program Files\Rhino 6\Plug-ins\AnimationTools.rhp “AnimationTools”
C:\Program Files\Rhino 6\Plug-ins\RhinoRender.rhp “Rhino Render”
C:\Program Files\Rhino 6\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 6.30.20266.14531
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\Common Files\McNeel\Rhinoceros\6.0\Plug-ins\RealDrawings (9aaa3b93-9ea4-4425-b44e-8a8c4500c274)\1.0.7038.31206\RealDrawings.rhp “RealDrawings” 1.0.7038.31206
C:\Program Files\Rhino 6\Plug-ins\RhinoCycles.rhp “RhinoCycles” 6.30.20266.14531
C:\Program Files\Rhino 6\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 6.30.20266.14531
C:\Program Files\Rhino 6\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 6\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 6\Plug-ins\Calc.rhp “Calc”
C:\Program Files\Common Files\McNeel\Rhinoceros\6.0\Plug-ins\SectionTools (fbdb1d7f-8cfb-42c1-9858-87cb6315932c)\2019.7.29.584\SectionTools.rhp “SectionTools”
C:\Users\Calyp\AppData\Roaming\McNeel\Rhinoceros\packages\6.0\PanelingTools\2018.12.17+906\PanelingTools.rhp “PanelingTools”
C:\Users\Calyp\AppData\Roaming\McNeel\Rhinoceros\packages\6.0\rhino-render-next\0.0.2\RhinoRenderNext.rhp “Rhino Render Next”

If your V6 or V7 WIP are not displaying material previews, run “TestRestoreLibraryFileAssociations” in the Windows V7 WIP, and it should re-register the thumbnail previewer dll for both V6 and V7.

Hello -

Chrome needs something to reflect - it appears your background is just gray, so that is how chrome would look in a dense fog. In the Render panel, click on ‘Reset to defaults’.

That will set the default Studio environment. Though, you might want to look through the available background images to spice it up a bit.