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VRayMtl is a very versatile material that allows for better physically correct illumination (energy distribution) in the scene and more convenient reflection and refraction parameters. This material can be easily set up to simulate a huge variety of surfaces from plastics to metals, glass and more by adjusting a handful of parameters.

Furthermore, with VRayMtl you can apply different texture maps, control the reflections and refractions, add bump and normal maps, self illumination and translucency.

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You can create a VRayMtl through the ||Content Browser|| > Add New > V-Ray > VRayMtl or from ||Content Browser|| > Add New > V-Ray > VRay Material Instance > Parent Material > VRayMtl.

 

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||Content Browser|| > Add New > V-Ray > VRayMtl

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||Content Browser|| > Add New > V-Ray > VRay Material Instance > Parent Material > VRayMtl

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To create a VRayMtl you have to first make a V-Ray Material Instance material and then assign the VRayMtl as a Parent material.

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In order to select  VRayMtl as a Parent material you have to first make the plugin folder VRayForUnreal visible. Enable Show Engine Content and Show Plugin Content in the View Options of the Content Browser. Then the VRay Materials will be listed in the Parent dropdown menu.


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When VRayMtl is assigned as a Parent and you want to create a solid material with no refractive, transparent or translucent properties, change the Blend Mode in the Material Property Overrides to Opaque.

 

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For your materials to work properly at render time make sure your textures have a valid file path (Source File in the texture Details panel). V-Ray loads the textures from that directory during rendering. If the texture is not found at the specified location, V-Ray will automatically export the texture. You can then find it in your project folder > Content > Texture Cache.

 

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