Hi,
This action will let you project a screen position ( mouse, touch, or 2d element) onto a 3d plane in the 3d world.
You can get it using the
ecosystem browser ( it's better, cause it's embedded in the Unity editor) or download it manually:
ScreenTo3dPlanePointScreenTo3dPlanePoint Editor ( very important to get this too, the interface is dynamic).
Bye
Jean