Better Nether Map Mod FAQ

Craft a map the normal way and use it in the Nether or any cave dimension. The mod automatically filters what the map displays based on the height setting, so you don't need a special item to begin.

The map only renders blocks that sit below the configured height, ignoring everything above it. This stops the Nether's ceiling from covering your map and lets you see the actual terrain you're walking on.

Open the mod's config and switch between using the map's creation level or entering a custom height value. Once set, any map you use will filter terrain to that level.

Map creation level uses whatever Y level you were standing at when the map was made, so each map filters to its own origin height. A custom height applies one fixed value to every map, which is better if you always explore at a consistent level.

Your height setting is probably below the terrain you're standing on, so nothing qualifies to be drawn. Raise the height value in the config until the floor and nearby blocks start appearing.

The height is set too high, so the map is rendering the roof instead of the ground. Lower the height setting to somewhere around the level you actually walk at.

It's designed for the Nether and cave-like dimensions where vertical stacking hides terrain, but the height filter will apply anywhere a map is used. In the Overworld it mostly just hides surface features above your chosen height.

Yes, but everyone who wants the filtered map view needs the mod installed on their client. Players without it will see normal unfiltered maps.

It only changes how vanilla maps render terrain, so it generally coexists with minimap mods. If another mod also overrides map rendering, expect one of them to take priority.

Filtering actually reduces what the map has to draw, so performance is usually the same or slightly better than an unfiltered map. Very large explored areas can still cause lag regardless of the height setting.