Versions Compared

Old Version 17

changes.mady.by.user Kristina Gaytandzhieva

Saved on

compared with

New Version 18

changes.mady.by.user Gergana Lilkova

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

Section
Column
width50%
The VRayMDLMtl material loads NVIDIA Material Definition Language files (.mdl) and renders them directly with V-Ray.

V-Ray supports NVIDIA Material Definition Language, version 1.5.2.

UI Text Box
typewarning

The MDL Material does not work within Distributed Rendering at this time.

Column
width5%
 
Column
width45%

 

UI Expand
titleUI Path: ||Right-click on the geometry|| > Assign New Material...
Section
Column
width5%
 
Column
width300px

||Right-click on the geometry|| > Assign New Material... > VRay section > VRay Mtl MDL


Column
width5%
 
Column
width280px

||V-Ray Shelf|| > Right-click to Create V-Ray Materials button > VRay Mtl MDL

 


Column
width500px

||Hypershade|| > Window tab > Create... > VRay section > VRay Mtl MDL



Column
width5%
 
Column
width5%

 

...

Section
Column
width5%

 

Column
width30%

 
Rubber Studded Black

 

Column
width30%

 
Stucco

 

Column
width30%

 
Walnut Semi-Gloss

 

Column
width5%

 

 

 

Basic

...

...

Section

The Basic rollout provides the attributes used to set the path to the .mdl file that you wish to load into your chosen material, and an Update button needed to refresh the other attributes available, based on the material file used.

Column
width60%


MDL file – Specifies the file path and .mdl file loaded.

Chosen material – If more than one material definition is included in the loaded .mdl file, the selected materials will be seen in the rollouts below.

MDL parameters– The Update button refreshes the additional material-specific attributes for the loaded .mdl file.

Column
width5%

 

Column
width33%

 

Image Modified

Parameters

...

Section
Column
width62%

Any additional material-specific attributes (if any) are listed in this rollout. The example below shows parameters for the Coated Flip-flop Paint material.

 

UI Text Box
typeinfo

 MDL material attributes that can accept Render Nodes to map color values can now use File textures as input. Note that while other texture types may also be used, only File textures are guaranteed to work properly.

Column
width5%

 

Column
width33%

Asphalt parameters

...

Section
Column
width62%

Max Ray Depth – Specifies the maximum reflection/refraction depth for the shader.

Remap Roughness – When enabled (default), determines whether the plugin expects squared values for GGX Roughness settings.

Column
width5%

 

Column
width33%

 

System Attributes

...

Section
Column
width62%

Filename – Specifies the file path and .mdl file loaded.

Column
width5%

 

Column
width33%

...

In order for the MDL Material to correctly import NVIDIA vMaterials, the following two paths should be set in the environment variable shown below:

VRAY_MDL_PATH_MAYA20yy_x64=%PROGRAMFILES%\Chaos Group\V-Ray\Maya 20yy for x64\mdl;%PROGRAMDATA%\NVIDIA Corporation\mdl;%USERPROFILE%\Documents\mdl

...

In some cases, when using MDL files exported from Substance Designer, V-Ray may fail to load some modules. In order to load these modules, a folder needs to be set up before starting Maya, as expalined explained below:

1.  Make a folder, for example, X:\MDL, that will act as the MDL repository. Put the MDL modules that are exported from Substance Designer into this folder.

...

VRAY_MDL_PATH_MAYA2018_x64=C:\Program Files\Chaos Group\V-Ray\Maya 2018 for x64\mdl;C:\Program Files\Adobe\Adobe Substance 3D Designer\resources\view3d\iray\alg;X:\MDL

 

Known Limitations

...

...

Fancy Bullets
typecircle
  • material_emission.mode is ignored
  • material.backface is ignored

  • df::diffuse_transmission_bsdf is not supported

  • df::backscattering_glossy_reflection_bsdf is not supported

  • df::measured_bsdf is not supported

  • From the “alternative distribution functions”, only df::microfacet_ggx_smith_bsdf is implemented

  • df::measured_edf and df::spot_edf are not supported

  • df::anisotropic_vdf is not supported

  • 3D textures are not yet supported

 

References

...

Fancy Bullets
typecircle