Universal Material Converter

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This Universal Material Converter is an enhanced version of the old AMC script. It convert materials between renderengines. It converts from Autodesk Materials and also converts textures as much as possible when needed.
Currently supported renderengines are: MentalRay, V-Ray, iRay, Corona, Scanline, FStorm, ART, Arnold, Octane, Redshift (beta)
Coming up: Maxwellrender (maybe)

You will need at least have a demo version of the renderengines installed if you want to be able to support conversions.

While for example converting a V-Ray material to Corona, it will also convert bitmaps to Corona-bitmaps and VRayDirtmap to CoronaAO.

This script is available from our webshop: https://3dstudio.nl/hikashop-menu-for-brands-listing/product/universal-m...
It comes with an .mzp installer, automatic renderengine check, check on duplicate materials (to make them instances). And the option to bake procedural textures to bitmaps when converting to Standard material, so you can export to several VR engines.

We have 2 videos on youtube to explain installation and usage

-- added 2018-07-10
version 1.6.2 is available, with support for OSL textures, Max2019, V-Ray NEXT, Corona v2 and it now will also check for duplicate materials that are nested.
A new feature is the option to load your own matlib file to get source materials from. (during conversion, it will check the matlib for a material with the same name and use that to replace instead of convert)

-- added 2019-12-16
version 1.8 is available. With support for Max2020, latest versions of all supported renderers. Support for FStormrenderer, basic support for RedShift, and support for conversions from Octane. Also new is the User Interface, the option to save/load your conversion preset and a VR mode for conversion to V-Ray, to bake procedurals and colorcorrections for export to Unreal (through V-Ray)

-- added 2020-07-01
version 1.95: V-Ray 5, Octane 2020.x and 3dsMax2021 support. Development for mentalray and iray conversion has stopped.

Additional Info: 

- added support for VRayOverrideMtl
- added support for VRayMtlWrapper
- added support for GTA3 material
- bugfixes based on user input
- conversion refinement based on user input
- added support for Autodesk Checker
- added support for Autodesk Gradient
- added VR mode (to correctly convert to scanline/standard when you want to go to Unity or Unreal)
- added dispersion override
- added subdivs/samples override
- load source matlib
- added support for FStorm
- added basic support for RedShift
- added support for conversion from Octane
- added new interface
- added better baking options
- added VR mode for V-Ray
- added load/save conversion presets
- added 1-click undo *(watch out, on large conversions, this can cause a crash!!)

Version Requirement: 
3dsMax 2017 and up
Other Software Required: 
V-Ray 3 or newer, iRay, Corona 1 or newer, MentalRay, Arnold, ART, FStorm, RedShift, Octane (demo license at least, no support for alpha or beta versions)
Video URL: 


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wader's picture

Thanks for your helpful

Thanks for your helpful reply!

I realize it's not supported, but I'd be interested to try it out on the older version to see if it's at all compatible. I don't mind purchasing and seeing if it fails or not (on my cognizance that it might fail) - the prospect of future Octane conversion is highly tempting.

Regardless, cool to hear of your priorities and completely fair to support later versions.

Stefan Twigt's picture

max 2015 and older

I'm sorry to say that I can no longer support 3dsMax 2015 and older, or older versions of V-Ray (before version 3) or before Corona v2.
Simply because I can no longer test this.
New developments in the script might break some old code, it shouldn't, but it might.

Also, I was contacted by OTOY, and a conversion will be added later this year. (Working on Redshift at the moment)

wader's picture

Older MAX or V-Ray support?

I still use an Autodesk 2012 Suite and was wondering if it's possible that this script might work with the 2012 MAX and V-Ray 2.40, please.

BTW, in the OTOY forums one of their Reps mentioned that they were not aware anyone asked you not to include Octane conversion :) .

ABouenard's picture

Thanks for you honest answer

Thanks for you honest answer Stefan!

Stefan Twigt's picture

Hi, I'm sorry to say that

Hi, I'm sorry to say that this is not possible.
Converting to Standard materials always means you will loose a lot of details from the material. It is not possible to support other material types in the FBX file (at the moment).

What you can do, is to save all materials in step 1 to a 3dsMax material library, after that, convert to standard and export to FBX. Load FBX scene and run the script, load the library and convert to V-Ray. It will replace all standard materials with the original V-Ray materials from the library..

(not sure why you would do the FBX export/import, but this should work)

It will not convert the materials, but just replace them with the originals from the matlib!

best regards!

ABouenard's picture

Lossless conversion?

Hey Stefan,

I am specifically interested in transporting VRay materials, which does not work out-of-the-box in 3dsMax.

Imagine I have a workflow like this one:

1) Convert all VRay materials to Standard with your tool, and then export to FBX
2) Load FBX scene (with Standard materials), and then convert all Standard materials to VRay

Will VRay materials outputted in step 2) be the very same than the ones in step 1) ?

I guess this is also a mean of what FBX supports in terms of materials, but in your opinion, will it have a chance to work?


Stefan Twigt's picture


this script use a node-locked license. To obtain the license, install the script, start it for the first time, fill in the form and send the .dat file to the given emailaddress.
We will return the licensefile as soon as possible. (usually within an hour, but please note we are in GMT+1 timezone, this is not an automated process).

jesusarq's picture


Hello, i bought the script yesterday...

please send me the license file, i would like to be able to use it.

Thank you...

3DZver's picture

The built-in V-Ray converter

The built-in V-Ray converter does not have those features that are in V-RayMtl Converter, and also it does not convert all the materials, maps and lights. Who used both converters, knows and understands the difference, which is not in favor of the V-Ray scene converter.
And by the way, my message is not an advertisement at all, but a simple help to a person who is looking for what he needs. I apologize and do not be offended at me for the fact that I tried to help a person in your subject.
Your script is good, but it is different, and we have nothing to share :)

Stefan Twigt's picture

you are funny!

and you say not to promote your script in the comments of others...funny person!
All the best to you, and yes, if you want to convert more than materials, but only for V-Ray, you can use your script, or you can use the built in V-Ray scene converter that comes with V-Ray...

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