Pondus Inventory [Sable]

The mod looks inside chests, barrels, fluid tanks and other containers and adds the weight of their items and fluids to the block they sit in. A water tank filled to the top tips a ship's balance differently from an empty one, and a cargo hold full of oil or other heavy goods changes how the airship holds its position. The mod is a companion to the Sable physics engine and requires Sable to run.

Mass is calculated from a detailed system that sets how much each block, item and fluid weighs. Server owners can change the mass of any block, item or fluid with in-game commands or settings, and a single scale number adjusts the whole physics system up or down. Commands need operator-level permissions at level 2. Changes to configs at runtime require invalidating the caches, so the mod's data is recalculated.

The mod is for Create, TerraFirmaCraft and Sable builds where a realistic mass balance matters. Fluid support depends on blocks and mods that implement NeoForge's IFluidHandler capability, and tanks that do not implement it are not counted. The configuration is split into separate files that the mod migrates from older flat files, backing up the originals first. The code is under the MIT License, so the mod is not open source in the catalog sense of a public repository license, and it is published for NeoForge only.