A 'variable' node in the material editor

[Todd.Vance]

@Spoondog

This would be nice. A local variable essentially (which it probably becomes when it’s compiled anyway). We implemented something like this in the UE3 material editor at the last place I worked.

not quite a local variable, just a way of hiding wiring by making it look like a local variable. This “variable” could never have two setters in the same material blueprint.