usd_preview_surface_default.mtlx

<?xml version="1.0"?>
<materialx version="1.38" colorspace="lin_rec709">
  <UsdPreviewSurface name="SR_default" type="surfaceshader">
    <input name="diffuseColor" type="color3" value="0.18, 0.18, 0.18" />
    <input name="emissiveColor" type="color3" value="0, 0, 0" />
    <input name="useSpecularWorkflow" type="integer" value="0" />
    <input name="specularColor" type="color3" value="0, 0, 0" />
    <input name="metallic" type="float" value="0" />
    <input name="roughness" type="float" value="0.5" />
    <input name="clearcoat" type="float" value="0" />
    <input name="clearcoatRoughness" type="float" value="0.01" />
    <input name="opacity" type="float" value="1" />
    <input name="opacityThreshold" type="float" value="0" />
    <input name="ior" type="float" value="1.5" />
    <input name="normal" type="vector3" value="0, 0, 1" />
    <input name="displacement" type="float" value="0" />
    <input name="occlusion" type="float" value="1" />
  </UsdPreviewSurface>
  <surfacematerial name="USD_Default" type="material">
    <input name="surfaceshader" type="surfaceshader" nodename="SR_default" />
  </surfacematerial>
</materialx>