V-Ray for 3ds Max and USD

[matanov]

Hello,

As some of you know, Autodesk is working on USD support for 3ds Max. They have kindly provided a SDK for us to hook up everything V-Ray related. So far things like V-Ray materials, textures, displacement and lights should be properly exported to USD.

Here you can find builds capable of exporting V-Ray data to USD - https://drive.google.com/drive/folde...y3?usp=sharing

Few notes for the shared builds:

• they will work only with USD3dsMax version 0.3.2.1980 (public beta available from Autodesk)
• these builds are meant only for testing, they might be unstable
• as of today, we've added only export functionality; rendering USD data still happens only through the VRayScene node; 3ds Max USD Stage node will not render V-Ray specific data
• the exported USD files should be properly consumed by V-Ray for Maya and Houdini
• a list with the things that are not exported to USD:
  • V-Ray object properties
  • VRayClipper
  • VRayDecal
  • VRayFur
  • VRayEnmeshMod
  • Chaos Scatter
  • VRayVolumeGrid
• when exporting make sure you've checked these:
  
  

[flat]

Is USD3dsMax version 0.3.2.1980 publicly distributed? i can't find it.
3dsMax USD from Autodesk Desktop app or Autodesk account looks like 0.3.0.

[matanov]

Is USD3dsMax version 0.3.2.1980 publicly distributed? i can't find it.
3dsMax USD from Autodesk Desktop app or Autodesk account looks like 0.3.0.

I got mine from the AD beta website. I'll share here as soon as there is more info.

[matanov]

There are new V-Ray builds in the shared folder that support the older USD3dsMax versions.

[flat]

Thanks for the old USD3dsMax support. I was able to test it.

User-Defined Properties tag and UVTile tag of VRayBitmapTex are not supported?
Maya's USD Loader and V-Ray Scene Loder(USD) does not handle these correctly.

However, the V-Ray 3dsMax vrscene object's USD Loader seems to correctly handle the VRayBitmap User-Defined Properties Tag from the USD.

[rasmus]

matanov Would it be possible to share that Autodesk USD plugin or a link? I cannot access it from my Autodesk Beta Forum Account. Or are your latest installers from the dropbox link compatible with USD 0.3.0xx release from Autodesk?

[matanov]

matanov Would it be possible to share that Autodesk USD plugin or a link? I cannot access it from my Autodesk Beta Forum Account.

I will most probably break some rule if I do that. Better contact the Autodesk guys to check why you don't see the files from your account.

[rasmus]

Thank you matanov , I will work with the 0.3.0 release then.

Can you tell me if i need to prepare or export my file textures for any vray material before USD export? Or will texture paths remain relative during the vray material export to .USD ? Can or should textures be "packed" into the .USD file, or will texture maps need to be right next to the .USD?

[matanov]

The Max exporter writes only full asset paths for now. You can export to .usda and then change the paths manually if needed.

[matanov]

The info in this thread is now kind of old. We've release official support in V-Ray 6.1 and here is the docs page - https://docs.chaos.com/display/VMAX/USD

[s0real]

hi. not sure where else to ask this - should the usd exporter be creating material files from vray materials on export?
i'm using the latest version of the exporter (v0.4.0.2282)

[dimitar_panayotov]

Hi. Currently 3ds Max exports monolithic USD files, containing both materials and geometry.
If you have V-Ray materials that are not exported, please first check if you selected the correct Plug-in Configuration in the export window.