From the Node Types dialog select the
crossbar1 user
Generated node.
Node
crossbar11 is placed in the Graph. Its technique is
set to
ByDefault, and it's required input is
polygon2 (the
"input" from the Generate Node Type dialog).
Draw a wire from the
polygon02 input to the overall node on
polygon1.
The crossbar grid populates
bslineSurface1.
In the Graph, right click on
polygon1 and select
Visible.
This turns off the display of polygon01
instances.
Repeat the previous step for
polygon2 and
bslineSurface1.
With the display of polygon1, polygon2 and
bsplineSurface1 toggled off, you can see the crossbar tunnel more clearly.
