以前，UV、逐顶点颜色和逐顶点用户数据均由索引引用。这将产生管线难题，因为很难强制索引。
现在，默认情况下，会将数据块添加到每个形状节点，这些节点能够提供每个数据片段（UV、CVP 以及逐顶点自定义数据）的名称。可以从着色器 API 中查询该表以获取并解析传递到某个着色器的 string 值。
渲染时可以将着色网络指定给多个对象，并指定逐顶点颜色和 UV，而无需在 Maya 场景中显式创建连接。渲染时，着色器负责将名称引用转化为逐实例索引或逐形状节点索引。
data "pPlaneShape1:PerVertexNomenclature"
"PerVertexNomenclature"
(
"magicnumber" 5149248936,
"tex" // texture space or Maya UVs
[
{ "name" "uvset1", "index" 0 }
{ "name" "myUVset", "index" 1 }
{ "name" "bakeUV", "index" 2 }
],
"cpv" // color per vertex (RGB only)
[
{ "name" "ColorSet1", "index" 3 }
{ "name" "CPV_DirtMask", "index" 4 }
{ "name" "CPV_WetMask", "index" 5 }
],
"cudpv" //custom data per vertex
[
{ "name" "LightIndexField", "index" 6 }
]
)
object "pPlaneShape1"
visible on
shadow 3
transparency 3
reflection 3
refraction 3
finalgather 3
face both
tagged
trilist vertex 4 p n t 2 b 2 u 3 triangle 2
[
vertex data goes here
]
[
0 0 1 3
0 3 1 2
]
end trilist
data "pPlaneShape1:PerVertexNomenclature"
end object
shader "DirtMapCPVLookup1" "myCustomVertexColor" ( "cpvname" "CPV_Dirtmask", .... )