# Older version of Rhino 8 - Shadow Bug

**URL:** <https://discourse.mcneel.com/t/older-version-of-rhino-8-shadow-bug/202482>\
**Category:** Rhino\
**Tags:** windows\
**Created:** [April 2, 2025, 6:04pm UTC](https://discourse.mcneel.com/t/older-version-of-rhino-8-shadow-bug/202482 "2025-04-02T18:04:46Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![albertglauner](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/albertglauner/32/663791_2.png) [@albertglauner](https://discourse.mcneel.com/u/albertglauner)\
**Post date:** [April 2, 2025, 6:04pm UTC](https://discourse.mcneel.com/t/older-version-of-rhino-8-shadow-bug/202482/1 "2025-04-02T18:04:46Z")

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Hey there,

since the latest update a week ago or so the Rendered and Raytraced modes don´t produce shadows on all objects anymore (however this doesn´t occur in all the files used, BUT also in completely new files).  
Even though the drivers are updated and the settings reset, the problem still exists.

Is there a possibility to go back to an older version?

Thank you!

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**Author:** ![Japhy](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/japhy/32/487647_2.png) [@Japhy](https://discourse.mcneel.com/u/Japhy)\
**Post date:** [April 2, 2025, 6:06pm UTC](https://discourse.mcneel.com/t/older-version-of-rhino-8-shadow-bug/202482/2 "2025-04-02T18:06:13Z")

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Hi Albert,

Do you have an example you can share?

Please run the SystemInfo command in Rhino and post the results.

Do you have a specific version and language in mind?

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**Author:** ![albertglauner](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/albertglauner/32/663791_2.png) [@albertglauner](https://discourse.mcneel.com/u/albertglauner)\
**Post date:** [April 2, 2025, 8:32pm UTC](https://discourse.mcneel.com/t/older-version-of-rhino-8-shadow-bug/202482/3 "2025-04-02T20:32:55Z")

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Yes, of course!  
This is the system info (I just reset Rhino and reinstalled, as well as updating the drivers from Nvidia, however the issue still persists):

Rhino 8 SR17 2025-3-7 (Rhino 8, 8.17.25066.07001, Git hash:master @ b14fcd901289f8715631debb308bc919a4988e07)  
License type: Educational, build 2025-03-07  
License details: Cloud Zoo

Windows 11 (10.0.26100 SR0.0) or greater (Physical RAM: 32GB)  
.NET 7.0.0

Computer platform: LAPTOP - Unplugged [96% battery remaining] ~176 minutes left

Hybrid graphics configuration.  
Primary display: Intel(R) Iris(R) Xe Graphics (Intel) Memory: 2GB, Driver date: 9-13-2024 (M-D-Y).  
\> Integrated graphics device with 4 adapter port(s)  
- Windows Main Display is laptop’s integrated screen or built-in port  
Primary OpenGL: NVIDIA RTX 2000 Ada Generation Laptop GPU (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)  
- Video pass-through to primary display device

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: 8188 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” 8.17.25066.7001  
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\IdleProcessor.rhp “IdleProcessor”   
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.17.25066.7001  
C:\Program Files\Rhino 8\Plug-ins\rdk\_etoui.rhp “RDK\_EtoUI” 8.17.25066.7001  
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”   
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.17.25066.7001  
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.17.25066.7001  
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.17.25066.7001  
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”

These are the examples: one completely new file, as well as the file where the issue first arose. The weird thing is, that the planes from the ground seem to make a shadow.

 ![Shadow-Bug-Rendered-New File](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/0/d/f/0df0eae4d4c1ec3416c05fa67c9349bbee8cb563.png)  
 ![Shadow-Bug-Rendered-First Problem File](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/8/0/b/80bba8fe5d93bd0c937fa44e1450a9a004693ab2.jpeg)

Also, trying it now - the issue only seems to be in Rendered mode.  
Can I help with any more info?

For the Rhino version, one or two updates ago and in English would be fine I think.

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<div class="post-metadata">

**Author:** ![Japhy](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/japhy/32/487647_2.png) [@Japhy](https://discourse.mcneel.com/u/Japhy)\
**Post date:** [April 2, 2025, 9:03pm UTC](https://discourse.mcneel.com/t/older-version-of-rhino-8-shadow-bug/202482/4 "2025-04-02T21:03:12Z")

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Sent some previous releases. If these do not help the issue please get on the latest and let me know and we will troubleshoot from there. Thanks

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**Author:** ![albertglauner](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/albertglauner/32/663791_2.png) [@albertglauner](https://discourse.mcneel.com/u/albertglauner)\
**Post date:** [April 2, 2025, 10:53pm UTC](https://discourse.mcneel.com/t/older-version-of-rhino-8-shadow-bug/202482/5 "2025-04-02T22:53:31Z")

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Thank you so much! I´ll check it out tomorrow

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<div class="post-metadata">

**Author:** ![albertglauner](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/albertglauner/32/663791_2.png) [@albertglauner](https://discourse.mcneel.com/u/albertglauner)\
**Post date:** [April 12, 2025, 2:39pm UTC](https://discourse.mcneel.com/t/older-version-of-rhino-8-shadow-bug/202482/6 "2025-04-12T14:39:36Z")

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Hey, sorry for the late reply, I responded in the private message before.  
I went back to the newest release, as reinstalling the older versions and trying these with older and newer drivers sadly didn´t work out.  
Can I assist with anything regarding trouble shooting possibilities?  
Thanks!

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**Author:** ![wim](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/wim/32/747482_2.png) [@wim](https://discourse.mcneel.com/u/wim)\
**Post date:** [April 14, 2025, 10:02am UTC](https://discourse.mcneel.com/t/older-version-of-rhino-8-shadow-bug/202482/7 "2025-04-14T10:02:59Z")

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Hi Albert -  
Since this used to work fine at some point, it’s likely that something like a Windows update did something with the drivers for the GPUs. I’d follow the links from the Rhino `Notifications` panel to find the newest drivers for your device and install those with the “Clean Install” option.

Apart from that, from your SystemInfo, you were running Rhino while on battery. Please read the following to make sure that the RTX is being used at all times when using Rhino:

> [@Soooo, you bought a laptop with hybrid graphics and rhino doesn't run right. READ THIS](https://discourse.mcneel.com/t/soooo-you-bought-a-laptop-with-hybrid-graphics-and-rhino-doesnt-run-right-read-this/109982):
>
> Hybrid graphics laptops are more and more common if you buy a consumer grade machine. (I recommend buying a mobile workstation for professional modeling but these hybrid machines are quite prevalent in the consumer market, especially for students.) They tend to generate a TON of tech support here because of the way they are set up from the factory. Hybrid systems are built with 2 graphics processors. A low power graphics chip (typically Intel HD or UHD) and a high power graphics card. However…

-wim

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<div class="post-metadata">

**Author:** ![albertglauner](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/albertglauner/32/663791_2.png) [@albertglauner](https://discourse.mcneel.com/u/albertglauner)\
**Post date:** [April 15, 2025, 9:18pm UTC](https://discourse.mcneel.com/t/older-version-of-rhino-8-shadow-bug/202482/8 "2025-04-15T21:18:16Z")

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Thank you so, so much! It´s all fixed now!  
I did not think about updating the Intel driver, so that was stupid… The RTX was already set up to always being used, but that´s also helpful to know!