When I mean by this, I want to make a hat: WHen you wear it, it changes the local lighting (light, fog, ect) to something else. How would this work? How would I make it?
Try editing the lightning properties from a LocalScript, whith Workspace.FilteringEnabled set to true, so the changes will affect only one player's lightning
Or you can just look at this model to help you...
www.roblox.com/Local-night-vision-goggles-tool-item?id=113582233