Anyone can tell me why my RayBounce node value showing null?
If the raybounce misses, it should output an empty list.
By any chance, is your active view not a 3D view?
Because you haven’t satisfied all the inputs.
Reviewing the dyn file that was submitted in a different thread.
Your Category and findNearest inputs have Use Default Value disabled (right click the input).
Because they are disabled, you now need an input, as Thomas has mentioned above.