Darkness Effect

Hey All! I want to make an effect where the player can see but maybe 1ft in front of them, but everywhere they have walked is lit up. Kinda like that scene in Beginner’s Guide where he is walking along the path. Any suggestions? I have no idea where to start on this one.

Postprocess materials, there are examples on internets.
Or maybe some creator made such material as part of package on marketplace.