Weighted items

Weighted Items

Weighted Items gives every carried item a physical cost. A backpack full of stone, iron and gold no longer feels the same as a few feathers and some food. The mod changes how movement responds to mass rather than applying the vanilla Slowness effect, so a loaded player builds momentum gradually and takes longer to stop.

What changes under load

• Slower acceleration and longer stopping distance while keeping normal movement recognizable
• Reduced jump impulse
• Stronger gravity and a higher falling speed
• Noticeable sinking in water and lava
• Slower climbing, with very heavy players tending to slide down
• Better resistance to knockback because a heavier body is harder to move
• Increased fall damage and exhaustion
• A smooth field-of-view reduction that communicates strain without adding a status effect
• Optional full overload: once the configured limit is reached, walking and jumping are blocked until weight is removed

Creative mode, spectator mode, flight, vehicles and elytra travel are excluded. Slow Falling and Levitation still take priority over the mod’s vertical physics.

Weight classes

Items are classified by material and type. Feathers, wool and similar supplies contribute very little. Stone, iron, gold, anvils and other dense materials matter much more. Stack size is always taken into account.

The calculation covers the complete player inventory, armor, off-hand items, bundles and container contents up to a safe nesting depth. Unclassified items use a conservative standard weight.

Configuration

Install Mod Menu to get a Configure button on the Weighted Items entry. The configuration screen has separate pages for interface, movement and survival realism.

Available settings include:

• enable or disable mass physics;
• show or hide the HUD meter;
• show or hide item weight tooltips;
• enable and tune the FOV effect;
• enable full overload and choose its threshold;
• change the effect onset and full-effect weight;
• tune ground and air response, jump strength, gravity and terminal fall speed;
• tune sinking in water and lava;
• tune climbing, knockback resistance, fall damage and exhaustion.

The same values are stored in config/weighted_items.json, so dedicated-server owners can edit them without Mod Menu. The server sends its gameplay settings to clients when they join, keeping client movement prediction aligned with server authority. HUD, tooltip and FOV visibility remain personal client choices.

Commands

• /weight shows your total carried weight and current load band.
• /weight top lists the five heaviest stacks in your inventory.

Datapack support

Weight categories use regular synchronized item tags under the weighted_items namespace. Modpack authors can add modded items or rebalance existing items with a datapack instead of editing the JAR.

Available tags:

• weighted_items:weightless
• weighted_items:very_light
• weighted_items:light
• weighted_items:medium
• weighted_items:heavy
• weighted_items:very_heavy

Requirements

• Minecraft Java Edition 1.21.11
• Java 21
• Fabric Loader 0.19.2 or newer for Minecraft 1.21.11
• Fabric API 0.141.4+1.21.11 or a newer compatible build
• Mod Menu 17.0.1-beta.1 or newer is optional and only required for the in-game configuration button