The Block Begin Compile works in concert with the Block End Compile to separate part of a node network from the rest of the graph.
Block Begin Compiles form the input into compiled block and mark the transition from normal SOP cooking into the compiled subgraph.
This node will rarely be explicitly placed. Instead, the Compile Block tab menu entry will generate a pair of block nodes in a single operation.
The path to the Block End Compile representing the end of the compiled sub-graph.
Normally all inputs are cooked prior to invoking the compiled block. This ensures no unexpected needs to return to the old cook engine and generally more controllable results. However, if the Optional flag is set the input will only be cooked on demand
This only applies to the top level of compile blocks, nested compile blocks currently will pre-cook all their inputs.
Create Block Begin Node
Creates a clone of this node with the appropriate block path setup.