Whats this node

Hi, I am trying to follow this documentation and I am struggling.

Would anyone know what this node is? “ApproxWorldSpaceNormal”

The pink node is a re route and work similar to a custom event
image

So the ApproxWorldSpaceNormal is just getting the input of Normalise and then being call from the Normal pin of the material(guessing by the image below)

oh my gosh thank you so much i will be sure to give this a try

Hello! Were you able to recreate the full shader?