Sub Graph Node
Provides a reference to a Sub Graph Asset. All ports on the reference node are defined by the properties and outputs defined in the Sub Graph Asset. This is useful for sharing functionality between graphs or duplicating the same functionality within a graph.
The preview used for a Sub Graph Node is determined by the first port of that Sub Graph Output Node. Valid Data Types for the first port are
Boolean. Any other data type will produce an error in the preview shader and the Sub Graph will become invalid.
Sub Graph Nodes and Shader Stages
If a Node within a Sub Graph specifies a Shader Stage, such as how Sample Texture 2D Node specifies the fragment Shader Stage, then that entire Sub Graph is now locked to that stage. As such a Sub Graph Node that references the graph will also be locked to that Shader Stage.