You can create new materials for objects directly in a USD stagedirectly.
You can choose from V-Ray materials represented as MaterialX nodes or any of the shading nodes that come with the standard MaterialX library.
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Native V-Ray material networks in Maya can be exported to .mtlx files with the Export Materials to MaterialX tool found under the V-Ray menu > Tools > Export Materials to MaterialX.
The exported files can later be reused by loading them with the VRayMaterialX loader material and directly assigned onto to native Maya geometry. The files can also be transferred to other applications that support MaterialX, such as Houdini's Solaris.
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This tool exports V-Ray materials from native Maya nodes to MaterialX nodes.
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MaterialX files can be loaded in V-Ray for Maya with the new VRayMaterialX material and directly assigned onto to native Maya geometry outside a USD stage. This allows using any readily available .mtlx files for rendering.
Loading a .mtlx file displays all materials stored in the file and allows choosing which material from the list is used for rendering.
