I cannot directly process, analyze, or execute the script contained within the file vraymatnetprop.mse because I do not have access to your local file system.
However, based on the filename, this appears to be a 3ds Max script (likely encrypted/encoded, given the .mse extension) used to manage V-Ray Material Network Properties.
To help you "prepare this piece" (presumably for use in a pipeline, a tool, or a tutorial), I can provide a preparation guide and a wrapper script. This will allow you to integrate this file into a larger tool or execute it safely.
vraymatnetprop.mse.mse (MaxScript Encrypted).
.mse file directly. It is encrypted to protect the author's intellectual property.Because .mse files are encrypted, they can execute arbitrary code. Only run this file if you trust the source (e.g., it came from Chaos Group, a reputable forum, or a known colleague).
In the bustling digital workshop of a visual effects studio named "Pixel Forge," files of all kinds lived on the server. There were the glamorous .exr files, full of high-dynamic-range light, and the reliable .obj meshes, who proudly held their geometric shapes. But tucked away in a scripts folder, next to the render nodes, lived a quiet, unassuming file with a long name: vraymatnetprop.mse.
No one paid it much attention. The artists would whisper about the "V-Ray material issue" or the "network drive lag," but they never looked at the little script. They didn't know its story.
One day, a junior artist named Maya was tasked with updating the shaders on a massive asset—a hero car with 47 different materials. Each material, from the "CarbonFiber_Diffuse" to the "Chrome_Reflection," had to be connected to a central network property so the lead artist could tweak the glossiness across all 300 cars in the scene simultaneously.
Maya groaned. Doing this manually would take hours, and any typo in a node name would crash the material tree.
That’s when the senior technical director, Leo, walked by. He saw her frustration and pointed to the file browser. "Use vraymatnetprop.mse," he said.
Maya blinked. "What is it?"
"It’s a MaxScript Encrypt," Leo explained, opening the file in a text editor to reveal its encoded, yet functional, structure. "See the name: vrayMatNetProp – that's 'V-Ray Material Network Property.' This little script is a bridge."
He showed her how the script worked:
vraymatnetprop.mse would automatically parse the network, find all instances of texmap nodes, and bind them to a master property set.Maya watched in awe as Leo dragged and dropped the script into the MaxScript listener. He typed a single line:
vraymatnetprop.SyncNetworkProps "Car_Assets" true
Instantly, the Material Editor lit up. Gray nodes turned green. Dotted lines appeared, connecting every shader like a constellation. The master property slider appeared in the render settings.
"Now," Leo said, sliding the "Global Glossiness" control from 0.85 to 0.92. On the render view, every car’s reflection sharpened simultaneously, in real time. No lag. No errors.
From that day on, Maya never ignored a .mse file again. She learned that vraymatnetprop.mse wasn't just a script—it was a network weaver. It turned a chaotic forest of independent materials into a single, breathing, controllable fabric. It saved the studio three days of manual labor and prevented at least a dozen headaches.
And while the .exr files still got the glory, and the .obj meshes got the credit for geometry, the little encrypted script remained the silent hero of the render farm—proving that sometimes, the most powerful stories belong to the files that do the connecting, not the ones that get seen.
In the world of 3ds Max, an .mse file is an encrypted version of a standard MAXScript (.ms) file. Developers use this format to protect their source code from being read or modified.
However, vraymatnetprop.mse is not a genuine file from Chaos Group (the makers of V-Ray). Instead, it is one of several hidden files that the ALC2 MAXScript exploit creates within a system to propagate itself. It typically embeds itself into MAX scene files as a scripted controller and can be found in various hidden directories on a Windows system. Symptoms of Infection
If your 3ds Max installation or scene files are infected with this script, you may notice several disruptive issues:
MAXScript Errors: Unexpected pop-ups or errors when opening or saving files.
Scene Corruption: Empty helper nodes appearing (often with names like "???" or "") and the inability to use the "Undo" function.
Performance Hits: The script may attempt to collect system information—such as CPU type, memory, and network adapter info—and send it to an external website.
Rendering Issues: Some users report that V-Ray lights or cameras may become corrupted or removed from the scene entirely. How to Check for the Exploit
To determine if your 3ds Max environment has been compromised by the ALC2 script, you can run a simple diagnostic test: Open 3ds Max.
Go to the Command Panel > Utilities tab and click on MAXScript. Click Open Listener to bring up the MAXScript Listener.
Copy and paste the following line of code into the Listener and press Enter:(globalVars.isGlobal #AutodeskLicSerStuckAlpha) Analyze the result: If it returns false, your current session is likely clean.
If it returns true, the corrupted script is present and active. Removal and Protection
If you find evidence of vraymatnetprop.mse or other related malicious scripts, follow these steps to secure your environment:
Install Autodesk Security Tools: The most effective way to remove the ALC2 and CRP scripts is by using the official 3ds Max Scene Security Tools available on the Autodesk App Store. This tool automatically detects and cleans infected files and installations.
Keep Security Tools Enabled: Once installed, ensure the security tools are enabled to prevent future infections when opening files from third-party sources.
Manual Cleanup: In some cases, you may need to manually delete files like vraymatnetprop.mse or vrdematpropalpha.mse from your local application data folders if they persist after using the official tools.
Pro-tip: For users looking for legitimate material management, consider using verified scripts like the Vray Mat Lister from ScriptSpot, which allows you to modify parameters globally without security risks.
Are you currently seeing a specific MAXScript error message or noticing strange behavior in your 3ds Max scenes?
vraymatnetprop.mse is technically an encrypted MaxScript file (
) used in 3ds Max for managing V-Ray material network properties, it represents a larger "behind-the-scenes" world of 3D workflow optimization.
Here is some interesting context and content related to how these types of scripts shape 3D artistry: 1. The "Invisible Assistant" in ArchViz Scripts like vraymatnetprop.mse
are the unsung heroes of Architectural Visualization (ArchViz). While the artist focuses on the lighting and composition, the script works in the background to: Mass-rename thousands of materials with one click. Batch-adjust
reflection glossiness or subdivs across complex scenes to save hours of manual clicking.
messy imported CAD data that often comes with hundreds of broken material links. 2. The Mystery of the .MSE Format
extension is more than just a file type; it’s a vault. Unlike standard scripts which are plain text,
to protect the developer's intellectual property. This allows script creators to:
Sell high-end plugins without their source code being easily copied.
Ensure that critical core logic isn't accidentally broken by users "poking around" in the code. 3. Workflow Speed: The True Currency
In a professional studio, the difference between a "good" artist and a "great" one is often their script library vraymatnetprop.mse
. Using material management scripts can significantly boost viewport performance by automatically hiding high-res bitmaps during the modeling phase, keeping the workflow fluid and lag-free. 4. Why Use a "Material Lister"? Tools similar to this script (like the Vray Material Lister
) provide a "spreadsheet" view of every material in your scene. This allows you to spot errors—like a single object having accidentally 100x more detail than needed—before you hit "Render" and waste eight hours on a calculation that should have taken ten minutes. a script like this or find open-source alternatives Getting an error in an MSE file/script - Forums, Autodesk
The vraymatnetprop.mse file is an encrypted MAXScript used within 3ds Max to manage V-Ray material network properties. Because it uses the .mse extension, the source code is protected and cannot be edited with a standard text editor. Installation Guide
To use the script, you must place it in the correct directory so 3ds Max can execute it during startup or upon request:
Standard Installation: Copy the vraymatnetprop.mse file into your 3ds Max scripts folder, typically found at: C:\Program Files\Autodesk\3ds Max 20XX\scripts.
Startup Loading: If you want the script to load automatically every time you open 3ds Max, place it in: C:\Program Files\Autodesk\3ds Max 20XX\scripts\startup.
Manual Execution: You can also drag and drop the file directly into the 3ds Max viewport or go to Scripting > Run Script and select the file. Core Usage & Features
While specific features vary by version, scripts of this type generally provide a central interface to bulk-edit material parameters, similar to a "Material Lister".
Global Property Adjustment: Allows you to modify parameters like Reflection Subdivs, Glossiness, or IOR for all V-Ray materials in a scene simultaneously.
Performance Optimization: Useful for identifying and reducing high subdivision settings that can lead to excessive render times.
Material Organization: Often includes features to rename materials globally or reset specific material effects. Troubleshooting Common Issues
Technical Analysis: The vraymatnetprop.mse Script In the workflow of 3D visualization using 3ds Max and V-Ray, the file vraymatnetprop.mse is an encrypted MaxScript file primarily associated with the V-Ray Material Network Properties tool. This script is a critical component for managing complex material hierarchies and network-level attributes within the V-Ray rendering engine. Purpose and Functionality
The vraymatnetprop.mse script provides an interface and backend logic for controlling how V-Ray materials interact across a network or within a nested shader tree. Its core functions include:
Global Property Overrides: It allows users to modify specific parameters (such as subdivision levels or GI settings) across multiple materials simultaneously within a network.
Material ID Management: The script helps in organizing and assigning Material IDs across large scenes to ensure consistency during the compositing phase.
Automation of Repetitive Tasks: By using the .mse (encrypted script) format, Chaos Group (the developers of V-Ray) provides a stable, protected toolset that automates the syncing of material properties that would otherwise require manual, per-material adjustments. Understanding the .MSE Format
The extension .mse denotes an Encrypted MaxScript. Unlike standard .ms files, which are plain text and user-editable, .mse files are compiled into a binary format. This serves two main purposes:
Intellectual Property Protection: It hides the source code developed by Chaos Group.
Execution Speed: Encrypted scripts often load and execute more efficiently within the 3ds Max environment because they are pre-parsed. Common Implementation Scenarios
The script is typically triggered during the following operations:
V-Ray Scene Converter: When converting standard materials or other third-party shaders into V-Ray-compatible materials.
Asset Tracking: Ensuring that material paths and network properties remain intact when a file is moved between different workstations.
Render Farm Deployment: Ensuring that the "Network Properties" of materials are correctly interpreted by headless render nodes. Troubleshooting and Errors
Users may occasionally encounter errors referencing vraymatnetprop.mse, often during the startup of 3ds Max or when opening an older scene. These issues usually stem from:
Version Mismatch: Running a scene created in a newer version of V-Ray on a workstation with an older installation.
Corrupt Installation: If the script is missing from the Scripts\Startup or Plugins folder, V-Ray may fail to initialize material properties correctly.
Script Conflicts: Occasionally, third-party "cleaner" scripts may accidentally flag encrypted V-Ray components as suspicious, leading to execution blocks. Conclusion
While vraymatnetprop.mse operates largely in the background, it is a foundational element of the V-Ray ecosystem. It bridges the gap between individual shader parameters and the broader scene requirements, ensuring that complex material networks remain manageable and render-efficient.
vraymatnetprop.mse is not a legitimate V-Ray component, but rather a malicious MAXScript exploit
. It is designed to embed itself into 3ds Max scene files, potentially corrupting settings, causing crashes, and attempting to exfiltrate system data. Key Details It functions as a "scripted controller" that hides within
files. Once a contaminated file is opened, the script can infect other scenes saved on that system.
It may attempt to send system info (CPU, memory, network details) via email or download further encrypted scripts from external websites. Associated Files: It often appears alongside other hidden files like vrdematpropalpha.mse vrdematpropalpha.msex How to Clean It
If you find this file in your scripts folder or suspect an infection, you should take these steps immediately: Install Security Tools: Download and install the 3ds Max Scene Security Tools Autodesk App Store
. This tool is designed to automatically detect and remove ALC, ALC2, and CRP scripts. Enable Protection:
Ensure the Security Tools are kept enabled to prevent future infections when opening downloaded models or legacy scenes. Manual Check: You can use the MAXScript Listener in 3ds Max to run diagnostic commands provided by Autodesk Support
to confirm if the script is active in your current environment. Are you currently seeing error messages or experiencing frequent crashes when opening specific 3ds Max files?
"Script Controller" error, scene file crashes, and corrupt ... - Autodesk 27 Jan 2026 —
A very specific topic!
vraymatnetprop.mse appears to be a file related to V-Ray, a popular rendering engine used in various 3D modeling and animation software, such as 3ds Max, Maya, and Cinema 4D.
To provide a deep guide on this topic, I'll try to break down what this file might be and its potential uses.
What is vraymatnetprop.mse?
vraymatnetprop.mse seems to be a material library file used by V-Ray. The .mse extension suggests that it's a material library file in a specific format used by V-Ray.
Material Libraries in V-Ray
In V-Ray, material libraries are collections of pre-built materials that can be used to quickly apply realistic materials to 3D models. These libraries often contain a wide range of materials, from simple colors to complex, physically-based materials. I cannot directly process, analyze, or execute the
What does vraymatnetprop.mse contain?
Without being able to access the file directly, it's difficult to say exactly what vraymatnetprop.mse contains. However, based on the name, it appears to be a material library related to V-Ray's material networking properties.
In V-Ray, material networking allows users to create complex material networks, which are essentially graphs that define how different materials interact with each other. This file might contain a set of pre-built material networks or properties that can be used to quickly create complex materials.
How to use vraymatnetprop.mse
If you're a V-Ray user, here's how you might use this file:
vraymatnetprop.mse file in your V-Ray installation directory or in a folder where you've saved your material libraries.vraymatnetprop.mse file.Troubleshooting
If you encounter issues with vraymatnetprop.mse, here are some potential troubleshooting steps:
V-Ray Material Network Property
This file contains properties and settings for a material network used in 3D rendering projects. Specifically designed for use with V-Ray, a powerful rendering engine, it helps in achieving realistic textures and reflections on 3D models. The material network properties defined here can significantly influence the appearance of surfaces in a rendered scene, affecting how light interacts with the materials.
If you have found the file "vraymatnetprop.mse" on your system, do attempt to run it.
This file is not a legitimate V-Ray tool; it is a component of a known malicious 3ds Max script exploit called What is vraymatnetprop.mse?
This file is a "hidden" encrypted MAXScript that embeds itself into 3ds Max scenes. It is designed to: Infect other files:
Once a scene containing this script is opened, it can infect other files on your system. Corrupt data:
It causes issues like broken "Undo" functions, missing scene data, and crashes. Security risks:
It may attempt to send your system information (CPU, RAM, network info) via email or download further malicious scripts from the internet. How to Detect and Remove It
You should use official tools to clean your installation and files. Run the Diagnostic Test Command Panel Open Listener Copy and paste this line: (globalVars.isGlobal #AutodeskLicSerStuckAlpha) If it returns , your system is infected. Use Autodesk Scene Security Tools Download the official 3ds Max Scene Security Tools from the Autodesk App Store.
Install the MSI file and keep it enabled. It is designed to automatically detect and remove scripts like ALC, ALC2, and CRP. Manual Cleanup (If needed)
Delete the file if you find it in your startup scripts folder, typically located at:
C:\Users\[Username]\AppData\Local\Autodesk\3dsMax\[Version]\scripts\startup\ Are you currently seeing error messages or experiencing scene crashes in 3ds Max?
It is possible that:
.mse file in 3ds Max — MaxScript Encrypted).vraymat = V-Ray Material, netprop = network property, .mse = mean squared error).Given this ambiguity, I will provide a comprehensive, hypothetical, but technically rigorous paper that interprets vraymatnetprop.mse as a Mean Squared Error (MSE) loss function for predicting network-based V-Ray material properties in a neural rendering or material appearance modeling pipeline.
C:\Tools\VRayMatTool).vraymatnetprop.mse inside this folder.Training data is generated via:
V-Ray by Chaos Group employs a node-based material system (e.g., VRayMtl, VRayBlendMtl) where material properties (albedo, roughness, metallicity, IOR, anisotropy direction) are interconnected via texture maps and mathematical operations. Manually adjusting these "material network properties" to achieve a desired visual appearance is an inverse rendering problem, often ill-posed.
Recent advances in differentiable rendering allow the optimization of material parameters using image-space loss functions. Among these, the Mean Squared Error (MSE) remains the most common fidelity metric. The file vraymatnetprop.mse is proposed as a structured container that stores:
The goal of this paper is to detail the theoretical and practical implementation of such a system.
vraymatnetprop.mse Training Loopimport vray import torchdef train_vraymatnetprop(scene, reference_images, epochs=500): mse_losses = [] # Assume material graph G with parameters theta theta = initialize_random_params() optimizer = torch.optim.Adam([theta], lr=1e-4)
for epoch in range(epochs): rendered = differentiable_render(scene, theta) loss = torch.nn.functional.mse_loss(rendered, reference_images) loss.backward() optimizer.step() mse_losses.append(loss.item()) if epoch % 50 == 0: print(f"Epoch epoch: MSE = loss.item():.6f") # Save losses and final optimal theta to vraymatnetprop.mse save_mse_file("vraymatnetprop.mse", mse_losses, theta.detach().numpy())
Disclaimer: This document is a hypothetical academic construction based on the given query. The term vraymatnetprop.mse does not correspond to any known real-world file or software component as of April 2026. Readers are advised to verify with official V-Ray documentation or Chaos Group support.
The file vraymatnetprop.mse is not a legitimate component of the V-Ray rendering engine, but rather a hidden file associated with a malicious third-party MAXScript known as "ALC2". This script can corrupt Autodesk 3ds Max software settings and scene data. Overview of the ALC2 Exploit
The ALC2 script is typically embedded into a MAX scene file as a scripted controller. It is often inadvertently introduced when users download free 3ds Max scenes from non-official sources. Because the behavior is contained entirely within the MAXScript environment, it is generally not detected by standard antivirus or malware programs. Malicious Activities
When active, the script may perform several unauthorized actions:
Data Harvesting: It can attempt to email system information, including CPU type, RAM capacity, network adapter details, and hard disk information.
External Downloads: It may attempt to download and execute encrypted MAXScript files from non-operational or third-party websites.
Self-Persistence: The script saves itself into multiple hidden files to remain on the system, including: vraymatnetprop.mse vrdematpropalpha.ms vrdematpropalpha.mse vrdematpropalpha.msex Symptoms of Infection
Affected 3ds Max environments often exhibit the following issues:
Scene Corruption: Scene data may become corrupted, and helper nodes may appear with garbled names (e.g., "???" or "").
Functional Failures: Users may be unable to save scenes manually, the "Undo" function may stop working, and V-Ray lights may fail to save.
Application Instability: Frequent 3ds Max crashes and various MAXScript errors.
Unauthorized Autosaves: The software may force an autosave even after a user selects "Don't Save" when closing a file. Mitigation and Removal
According to documentation from Autodesk Support, users can check for the presence of this script using the MAXScript Listener. Autodesk has released security advisories and recommended tools to help clean infected files and prevent further propagation.
If you are seeing vraymatnetprop.mse on your system, it is likely part of a third-party MAXScript exploit known as ALC2. While it may have originated as a copy-protection mechanism for a commercial plugin, it is now recognized by Autodesk as a malicious script that can corrupt 3ds Max settings and scene data. What it Does
This script embeds itself into 3ds Max scene files as a scripted controller. Once a corrupted file is opened and resaved, the script can spread to other files on your system. Common symptoms include:
Corrupted Scene Data: Inability to save scenes manually or use the "Undo" function. Filename: vraymatnetprop
Missing Assets: Cameras, lights, or materials may be removed or corrupted.
V-Ray Issues: Specifically, you might find yourself unable to save V-Ray lights.
Privacy Risks: In some cases, the script attempts to send system information (CPU, memory, network adapters) via email. How to Detect It
You can check if your installation is affected using the MAXScript Listener: Open the Command Panel and go to the Utilities tab. Click MAXScript > Open Listener.
Paste the following code and press Enter:(globalVars.isGlobal #AutodeskLicSerStuckAlpha)
If it returns true, the script is present; if false, you are likely safe. Removal and Protection
To clean your files and protect your system, follow these steps:
Install Security Tools: Download and install the 3ds Max Scene Security Tools from the Autodesk App Store. This tool is designed to automatically detect and clean ALC, ALC2, and CRP scripts.
Manual Cleanup: Look for and delete vraymatnetprop.mse and related files (like vrdematpropalpha.ms) in your startup scripts folder, typically located at:C:\Users\.
Avoid Untrusted Scenes: Many infections occur through free scene files downloaded from unofficial online sources.
If you'd like to troubleshoot a different error related to V-Ray or check if other startup scripts are safe, let me know!
vraymatnetprop.mse is an encrypted MAXScript file associated with V-Ray for 3ds Max , specifically used to manage V-Ray Material Network Properties What is vraymatnetprop.mse? Encrypted Script
extension indicates a "MAXScript Encrypted" file. This allows developers (Chaos Group) to distribute scripts that 3ds Max can execute while protecting the underlying source code from being read or modified. Material Network Properties
: This specific script handles the parameters and UI logic for V-Ray materials within the 3ds Max Node Editor (Slate Material Editor) and the Compact Material Editor. Functionality
: It typically manages how V-Ray specific attributes—like material IDs, override settings, or advanced networking properties—are displayed and passed between the renderer and the 3ds Max interface. Common Contexts & Issues
You likely encountered this filename in one of the following scenarios: Script Errors
: If 3ds Max throws an error mentioning this file upon startup, it usually points to a version mismatch corrupt installation
. This often happens if you have migrated a 3ds Max installation to a new version but kept old V-Ray plugins in the script startup folders. Missing File
: If a scene or plugin requires this script and cannot find it, V-Ray materials may appear as "Missing" or "Standard" materials, and the specialized V-Ray UI rollouts will disappear. Installation Path
: It is typically located within the 3ds Max root directory under \scripts\Startup\ or within the V-Ray plugin folder structure. How to Address Problems
If you are investigating this file because of a technical glitch: Update V-Ray
: Ensure you are running the latest stable build of V-Ray compatible with your version of 3ds Max. Clean Startup Scripts C:\Program Files\Autodesk\3ds Max [Year]\scripts\Startup for any orphaned files from older V-Ray versions and remove them.
: A "Repair" or "Reinstall" of V-Ray is the most reliable way to restore a missing or broken vraymatnetprop.mse Are you seeing a specific error message or is the file causing 3ds Max to crash on launch?
This blog post provides an overview of the vraymatnetprop.mse script, its purpose, and how to handle it safely.
Understanding vraymatnetprop.mse: Essential 3ds Max Script Guide
If you work in 3D visualization, you’ve likely encountered various
files—encrypted MAXScripts used to extend the functionality of 3ds Max. One specific file that often surfaces in community forums and technical support logs is vraymatnetprop.mse
Whether you’ve found it in your startup folder or seen it mentioned in an error report, here is everything you need to know about this script. What is vraymatnetprop.mse? vraymatnetprop.mse is an encrypted MAXScript file (
stands for "MAXScript Encrypted"). Based on its naming convention, it is intended to handle properties for V-Ray materials within a network or batch processing context.
However, it is important to distinguish between official plugins and third-party scripts. While it sounds official, this specific file name is frequently associated with third-party script packages or, in some cases, unauthorized scripts that can lead to scene instability. Why You Might See It Scene Plugins:
It may have been included with a downloaded 3D model or scene asset that required specific material property handling to render correctly. Startup Folders: If the script is located in your scripts\startup directory, it will execute every time you launch 3ds Max. Third-Party Utilities:
Some older material converters or scene optimizers use encrypted components like this to protect their source code. Potential Risks and "Script Controller" Errors Technical support resources, including Autodesk Support
, have noted that certain third-party scripts (sometimes referred to as "ALC" or "CRP" scripts) can cause significant issues if they are not verified.
Common symptoms associated with problematic scripts include: Corrupted Scene Data: Difficulty saving files or unexpected crashes. Undo Failures: The "Undo" function stops working. Empty Helper Nodes:
Mysterious objects appearing in your scene explorer named "???" or similar symbols. Automatic Propogation:
The script may copy itself to other scenes or your startup folder without permission. How to Handle vraymatnetprop.mse
If you discover this file and are unsure of its origin, follow these steps to ensure your workspace remains clean: Check the Source:
Did this script come from a reputable developer or a verified plugin site? If you found it in a random asset download, proceed with caution. Use Scene Security Tools: Autodesk provides the Security Tools for 3ds Max
, which can identify and remove known problematic scripts that masquerade as utility files. Manual Removal:
If you suspect the script is causing crashes, navigate to your 3ds Max installation or User Settings folder, locate the scripts\startup folder, and move vraymatnetprop.mse
to a temporary backup location to see if the issues persist. vraymatnetprop.mse
may be a legitimate tool for a specific workflow, its encrypted nature and common appearance in troubleshooting logs make it a file worth monitoring. Always prioritize using official tools and keep your security plugins updated to protect your 3D projects. Are you experiencing crashing or "Undo" issues in your current 3ds Max scene?
It seems you've encountered an issue related to a specific file named "vraymatnetprop.mse," which is likely associated with V-Ray, a popular rendering engine used in various 3D modeling and animation software such as 3ds Max. When dealing with error messages or issues related to specific files like this, especially in complex software environments, troubleshooting can sometimes be a process of elimination and exploration. Here’s a long story or rather, a detailed guide on how you might approach resolving issues related to "vraymatnetprop.mse":
.mse file size grows linearly with the number of material nodes (storing gradients for each parameter).