Type alias BuiltinShaderAttributeName
BuiltinShaderAttributeName: "position" | "normal" | "uv" | "color" | "skinIndex" | "skinWeight" | "instanceMatrix" | "morphTarget0" | "morphTarget1" | "morphTarget2" | "morphTarget3" | "morphTarget4" | "morphTarget5" | "morphTarget6" | "morphTarget7" | "morphNormal0" | "morphNormal1" | "morphNormal2" | "morphNormal3"