Blender 3.3 : Geometry Nodes : Two experiments with Raycast node
https://docs.blender.org/manual/en/la...
Excerpt from the Blender Manual
The Raycast node intersects rays from one geometry onto another. The source geometry is defined by the context of the node that the Raycast node is connected to. Each ray computes hit points on the target mesh and outputs normals, distances and any surface attribute specified.