<?xml version="1.0"?>
<scene>
  <Group>
    <TriangleMesh>
        <positions>
          -2 -1 1
           0 -1 1
          -1  1 1
        </positions>
      <triangles>
        0 1 2
      </triangles>
      <material>
        <code>"OBJ"</code>
        <parameters>
          <float3 name="Kd">1 1 1</float3>
        </parameters>
      </material>
    </TriangleMesh>
  </Group>
</scene>
