daren cheng 0e796eb369 Add grouping to material graph. ...

Add composite & pinbase expressions / nodes, which use reroutes under the hood to ensure zero material overhead.
Convert MaterialEditor to a WorkflowCentricApplication.
Generally add subgraph existence support to MaterialGraph / MaterialEditor.

#jira UE-96104
#rb Ben.Ingram Lauren.Barnes
#fyi Lauren.Barnes

[CL 14437968 by daren cheng in ue5-main branch]

2020-10-07 10:35:24 -04:00

1.1 KiB

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