Error arnoldshadersloader.gup in 3Ds Max

Vasyl Lukianenko
3D Artist and Technical Author

Date: July 22, 2024 Updated on: May 23, 2025 Reading time: 3 min Views: 479

Where does the error "arnoldshadersloader.gup" come from (Imager Denoiser Oidn)

In the new 3Ds Max 2024 and higher, new features have been added to the Arnold render engine related to loading shaders.

The problem occurs when you try to save your scene for a smaller version such as 3Ds Max 2022.

Since there is no implementation of backward compatibility, and even though this functionality is not present in older versions of 3Ds Max, traces of the arnoldshadersloader.gup plugin remain in the scene.

Effect of error on our work

Thus, when trying to open a scene on older 3Ds Max, an error occurs related to this plugin (arnoldshadersloader.gup), which cannot be resolved.

This is especially critical for models added to 3D Stocks, as it negatively impacts the moderation process and user experience.

The geography of this problem is quite large and Autodesk is no longer able to influence it. Thousands of 3D models have already been uploaded to 3D Stocks with this error and it is no longer possible to fix it.

So you can use Prune Scene and remove the plugin content from the scene and prepare your model properly.

Solution

Download Prune Scene

Unfortunately, at the moment there is no automatic correction for this error; processing must be done manually.

First case

You have downloaded the model and when you open it you see the error arnoldshadersloader.gup (Imager Denoiser Oidn).

To prevent entries about the plugin from spreading to other projects and scenes, follow these steps:

Open the problematic model
Ignore the error and click Open
Run the Prune Scene script
Make sure you have it enabled Missing Plugins option
Start cleaning
Save the scene

After these steps, this error will disappear.

Second case

Option 1

You upload a model to 3D Stock or transfer your model or scene to someone, running 3Ds Max 2023 or lower.

To do this, you need to have an older version of 3Ds Max, for example 2022.

Open the scene in 3Ds Max 2022 (ported from version 2024 or higher)
Run the Prune Scene script
Make sure you have the Missing Plugins option enabled
Start cleaning
Save the scene

After these steps, this error will disappear and you will be able to send such a model to 3D Stocks or your colleagues.

Option 2

Also, the user Stanislav But has proposed his solution to this problem.

Carefully! Removing any programs can affect your workflow!

The idea is to completely remove the Render Arnold.

To do this, you need to go to Settings → Apps → Installed Apps.

Next in the list of programs, find MAXtoA for 3DS max (your version) and delete from the computer.

After that, the next saving *.max files will be without plugins associated with the Render Arnold.

FAQ

1. What is this article about?

This article discusses the ArnoldShadersLoader.gup error in Autodesk 3ds Max, its possible causes, and methods for resolving the issue.

2. What is ArnoldShadersLoader.gup?

ArnoldShadersLoader.gup is a system component of Arnold Renderer responsible for loading Arnold shaders and related functionality inside Autodesk 3ds Max.

3. Why does the ArnoldShadersLoader.gup error appear?

The error can be caused by corrupted Arnold files, incomplete updates, plugin conflicts, or issues with the 3ds Max installation.

4. Can the error appear after updating 3ds Max?

Yes. In some cases, updates may cause compatibility issues between Arnold components and existing plugins or system files.

5. Does the error affect the startup of 3ds Max?

Yes. The error often appears during startup and may slow down the launch process or generate warning messages.

6. Is the error related only to Arnold Renderer?

In most cases, yes. However, it can also be triggered by third-party plugins, damaged system files, or installation problems within 3ds Max.

7. Can the issue occur after uninstalling plugins?

Yes. Improperly removed plugins may leave behind references to missing files, causing loading errors during startup.

8. Can a damaged Arnold installation cause this error?

Yes. Missing or corrupted Arnold files are among the most common causes of the ArnoldShadersLoader.gup error.

9. Does reinstalling Arnold Renderer help?

In many cases, yes. Reinstalling Arnold can restore missing files and repair damaged components.

10. Can the error affect rendering?

Yes. Depending on the underlying cause, Arnold Renderer may become unstable or fail to render altogether.

11. Is it necessary to reinstall 3ds Max completely?

Not always. Many cases can be resolved by repairing or reinstalling Arnold components without reinstalling the entire application.

12. Can the error be caused by version conflicts?

Yes. Using incompatible versions of 3ds Max, Arnold Renderer, or third-party plugins can lead to this type of error.

13. How can I tell if Arnold is causing the problem?

Error messages that specifically mention ArnoldShadersLoader.gup or other Arnold-related files are usually strong indicators that Arnold is involved.

14. Can this type of error be prevented?

Yes. Installing updates correctly, using compatible software versions, and avoiding manual removal of system files can help prevent such issues.

15. Is this article useful for beginners?

Yes. The article explains the most common causes of the error and basic troubleshooting methods in an easy-to-understand way.

16. Can I fix the ArnoldShadersLoader.gup error myself?

In many cases, yes. Most issues are related to configuration problems, updates, or damaged files and can be resolved without contacting technical support.

Vasyl Lukianenko
3D Artist and Technical Author

Vasyl Lukianenko is a 3D artist and technical author focused on practical workflows, optimization, and production-ready techniques. He publishes tutorials, courses, and tools to help artists work faster and get cleaner results.