Light/Sun/Moon beam for dark or ambient rooms.
You will need to change your room to a darker one when deriving this as it will not show up in the white Create Mode room unless you turn blending off.
Marker (rock) for easy locating of node.
3 different mesh shape options (just swap the XMFs around to see)
Map Option 1
Map Option 2
Map Option 3
Example additive texture for Option 1.