| siShaderCnxPointNone |
[0] Reference none of the connections on a parameter. (not normally used) |
| siShaderCnxPointBasePorts |
[1] Reference only regular shader connections (not including texture layer port connections). "Regular connections" refers to connections of one shader to another. |
| siShaderCnxPointTextureLayerPorts |
[2] Reference texture layer port connections only. |
| siShaderCnxPointAll |
[65535] Reference all types of shader connections, including both regular and texture layer port connections. |