Rendered viewport visual artifact (shadow)

Rhino Rhino for Windows
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1

I ran into a strange visual artifact when I turn on Rendered Viewport in the Perspective window. The model is very simple, just a cube with a material from the library that comes with Rhino and a light.

Is this just some bad setting somewhere or is this an issue with the view renderer? (The Artistic Viewport also has visual artifacts around the edges, but the rendered output and other viewports are fine.)

Here’s the 3dm file:

Rhino8-RenderedView-issue.3dm (725.5 KB)

The edges of the object have a shadow next to them:

Rhino8-RenderedView-issue-2025-10-18-212900
Rhino8-RenderedView-issue-2025-10-18-2129001859×991 146 KB

Here’s my system info:

Rhino 8 SR24 2025-10-8 (Rhino 8, 8.24.25281.15001, Git hash:master @ ba28668a8431990c700173e46ef2dbcb873cf092)
License type: Commercial, build 2025-10-08
License details: Cloud Zoo

Windows 10 (10.0.19045 SR0.0) or greater (Physical RAM: 32GB)
.NET 8.0.21

Computer platform: LAPTOP - Plugged in [100% battery remaining]

Non-hybrid graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 2060 (NVidia) Memory: 6GB, Driver date: 3-14-2025 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 572.83

Integrated accelerated graphics device with 4 adapter port(s)

  • Windows Main Display is laptop’s integrated screen or built-in port
    Primary OpenGL: NVIDIA GeForce RTX 2060 (NVidia) Memory: 6GB, Driver date: 3-14-2025 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 572.83

Integrated accelerated graphics device with 4 adapter port(s)

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

Secondary graphics devices.
Intel(R) UHD Graphics 630 (Intel) Memory: 1GB, Driver date: 6-1-2021 (M-D-Y).

Integrated graphics device with 3 adapter port(s)

  • There are no monitors attached to this device. Laptop lid is probably closed

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 GPU’s 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: 3-14-2025
Driver Version: 32.0.15.7283
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 6 GB

Rhino plugins that do not ship with Rhino
C:\Users{username}\AppData\Roaming\McNeel\Rhinoceros\6.0\Plug-ins\ColorPicker (336da4ab-03d3-42ca-b1fb-313bfd4c1157)\2019.2.15.811\ColorPicker.rhp “ColorPicker”

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.24.25281.15001
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\AnimationTools.rhp “AnimationTools”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.24.25281.15001
C:\Program Files\Rhino 8\Plug-ins\RhinoRender.rhp “Legacy Rhino Render”
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.24.25281.15001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.24.25281.15001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.24.25281.15001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.24.25281.15001
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”