<xs:group name="TextureBackgroundChildContentModel">
    <xs:annotation>
        <xs:appinfo>TextureBackgroundChildContentModel is the child-node content model corresponding to TextureBackground.  TextureBackgroundChildContentModel can contain up to six Texture nodes (ImageTexture, MovieTexture, MultiTexture or PixelTexture).  Each child texture must have a different containerField for topTexture, bottomTexture, leftTexture, rightTexture, frontTexture and backTexture.</xs:appinfo>
        <xs:documentation source="http://www.web3d.org/x3d/specifications/ISO-IEC-FDIS-19775-1.2-X3D-AbstractSpecification/Part01/components/enveffects.html#TextureBackground" />
    </xs:annotation>
    <xs:choice>
        <xs:element ref="ImageTexture" />
        <xs:element ref="MovieTexture" />
        <xs:element ref="MultiTexture" />
        <xs:element ref="PixelTexture" />
        <xs:element ref="ProtoInstance" />
    </xs:choice>
    <!--Controversial construct, throws errors if includes minOccurs="0" maxOccurs="6".  Deterministic content model.
		    Moved constraint to parent referring xs:group OK.  Still need to test if more than 6 children will be invalidated.-->
</xs:group>