Is this a bug, or are there settings for shadows to prevent this?
Hi @hannesgrebin
Are you either very far from W0,0,0 or is this a very small object in a very large scene? Both can result in weird shadow maps. If not, try and post the objects, so we can test if this could be a graphics card driver issue.
HTH, Jakob
@Normand putting everything to W0,0,0 helps. But what I encounter on my end, that this will happen only in shaded mode, rendered mode has no issues. There is also a weird issue that scale for curves (on my end 3) would be overridden to 1 if you zoom in on objects in these far areas. Also, only in shaded view.
Hi @hannesgrebin
Maybe @DavidEranen or one of the other OpenGL brains can shed some light on the matter? 
-Jakob
Hi Hannes -
If you provide 3dm files, we can look into the issues that you are running into.
-wim
@wim here is the file
Rhino shading issue.3dm (10.3 MB)
the scene is partially imported from a skp file.
@wim here is it
Rhino 8 SR17 2025-3-4 (Rhino 8, 8.17.25063.13001, Git hash:master @ c65802ca75d5024ddf5b5197f19835a008a846a2)
License type: Commercial, build 2025-03-04
License details: Cloud Zoo
Windows 11 (10.0.26100 SR0.0) or greater (Physical RAM: 64GB)
.NET 7.0.0
Computer platform: LAPTOP - Plugged in [100% battery remaining]
Non-hybrid graphics configuration.
Primary display and OpenGL: NVIDIA Quadro RTX 4000 (NVidia) Memory: 8GB, Driver date: 11-29-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 553.46
> Integrated accelerated graphics device with 4 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port
- Secondary monitor attached to adapter port #1
Primary OpenGL: NVIDIA Quadro RTX 4000 (NVidia) Memory: 8GB, Driver date: 11-29-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 553.46
> Integrated accelerated graphics device with 4 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port
- Secondary monitor attached to adapter port #1
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: 11-29-2024
Driver Version: 31.0.15.5346
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 8 GB
Rhino plugins that do not ship with Rhino
Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.17.25063.13001
C:\Program Files\Rhino 8\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoScript.rhp “RhinoScript”
C:\Program Files\Rhino 8\Plug-ins\AnimationTools.rhp “AnimationTools”
C:\Program Files\Rhino 8\Plug-ins\IdleProcessor.rhp “IdleProcessor”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.17.25063.13001
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.17.25063.13001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.17.25063.13001
C:\Program Files\Rhino 8\Plug-ins\QuadRemesh\QuadRemesh.rhp “QuadRemesh” 8.17.25063.13001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.17.25063.13001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.17.25063.13001
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”