tinyusdz/models/geomsubset-material-001.usda

#usda 1.0
(
    defaultPrim = "grid2"
    endTimeCode = 1
    framesPerSecond = 24
    metersPerUnit = 1
    startTimeCode = 1
    timeCodesPerSecond = 24
    upAxis = "Y"
)

def Xform "grid2" (
    kind = "component"
)
{
    matrix4d xformOp:transform:xform = ( (1, 0, 0, 0), (0, 1, 0, 0), (0, 0, 1, 0), (0, 0, 0, 1) )
    uniform token[] xformOpOrder = ["xformOp:transform:xform"]

    def Mesh "mesh_0"
    {
        float3[] extent = [(-1, 0, -1), (1, 0, 1)]
        int[] faceVertexCounts = [4, 4, 4, 4, 4, 4, 4, 4, 4]
        int[] faceVertexIndices = [0, 1, 5, 4, 1, 2, 6, 5, 2, 3, 7, 6, 4, 5, 9, 8, 5, 6, 10, 9, 6, 7, 11, 10, 8, 9, 13, 12, 9, 10, 14, 13, 10, 11, 15, 14]
        uniform token orientation = "leftHanded"
        point3f[] points = [(-1, 0, -1), (-0.3333333, 0, -1), (0.33333337, 0, -1), (1, 0, -1), (-1, 0, -0.3333333), (-0.3333333, 0, -0.3333333), (0.33333337, 0, -0.3333333), (1, 0, -0.3333333), (-1, 0, 0.33333337), (-0.3333333, 0, 0.33333337), (0.33333337, 0, 0.33333337), (1, 0, 0.33333337), (-1, 0, 1), (-0.3333333, 0, 1), (0.33333337, 0, 1), (1, 0, 1)] (
            interpolation = "vertex"
        )
        uniform token subdivisionScheme = "none"

	
        uniform token subsetFamily:materialBind:familyType = "partition"
        def GeomSubset "subset_red"
        {
            uniform token elementName = "face"
            uniform token familyName = "materialBind"
            int[] indices = [0, 1, 2]
            rel material:binding = </Looks/Red>
        }
        def GeomSubset "subset_green"
        {
            uniform token elementName = "face"
            uniform token familyName = "materialBind"
            int[] indices = [3, 4, 5]
            rel material:binding = </Looks/Green>
        }
        def GeomSubset "subset_blue"
        {
            uniform token elementName = "face"
            uniform token familyName = "materialBind"
            int[] indices = [6, 7, 8]
            rel material:binding = </Looks/Blue>
        }
    }
}

def "Looks"
{
    def Material "Red"
    {
        token outputs:surface.connect = </Looks/Red/sampleShader.outputs:surface>

        def Shader "sampleShader"
        {
            uniform token info:id = "UsdPreviewSurface"
            color3f inputs:diffuseColor = (1, 0, 0)
            token outputs:surface
        }
    }

    def Material "Green"
    {
        token outputs:surface.connect = </Looks/Green/sampleShader.outputs:surface>

        def Shader "sampleShader"
        {
            uniform token info:id = "UsdPreviewSurface"
            color3f inputs:diffuseColor = (0, 1, 0)
            token outputs:surface
        }
    }

    def Material "Blue"
    {
        token outputs:surface.connect = </Looks/Blue/sampleShader.outputs:surface>

        def Shader "sampleShader"
        {
            uniform token info:id = "UsdPreviewSurface"
            color3f inputs:diffuseColor = (0, 0, 1)
            token outputs:surface
        }
    }
}