Inventory Move Speed - Barebones Framework

What it is

[[Designed for as a barebones framework for modders to flesh out!]]

The lighter your main backpack (the big grid in the E menu), the faster you walk and sprint. The more of that grid is filled, the slower you are. The hotbar is ignored.


Purpse 

In real life, an almost empty rucksack is easier to move with than one where every pocket is full. The game does not have a “weight” system for every item, so this mod does not try to be realistic. It does something much simpler: it only cares about how many backpack slots have at least one item in them, compared to how many slots you have in total. That’s the “how packed am I” feeling, without a spreadsheet of ore vs feathers.

When you open Inventory and Crafting (E), you usually see:

• A bottom strip of quick slots (the hotbar) — the stuff you have ready to use.
• A bigger area of slots that feels like storage (and grows when you equip baskets/bags in the right places).

This mod only looks at the big pack area — the game’s “backpack” storage for that character. It does not look at the hotbar. So: moving a sword to the hotbar doesn’t change this mod’s idea of “encumbrance” if the sword isn’t in the main grid. The mod is about haul in the rucksack, not what’s in your hand row.

Think of the backpack as a row of boxes (and more rows if you have more slots).

• Empty box = doesn’t count as “using” a slot (for the “used” count).
• Box with anything in it = counts as one used slot.
  • One feather in a box counts the same as a stack of 64 of something.
  • So the mod is not saying “heavier ores = slower” — it’s only saying “more slots touched = fuller.”

From that, it figures out a percent full:
Out of all my backpack slots, what fraction have something in them?
(If you have 20 slots and 10 have items, you’re at 50%.)

When you equip better bags and get more rows, the total number of boxes goes up. The mod always uses “how many full boxes / how many total boxes right now,” so when your pack gets bigger, the percentage can go down if you add empty space without adding junk — it doesn’t “penalize” you forever for a small early-game pack in a weird fixed way; it’s always “relative to the grid you have today.”

The mod does not add its own screen. The game’s Character (often C) view already lists your movement and breaks out where bonuses and penalties come from. This mod only adds one of those “sources” to your walk and sprint, so you can see it there like any other layer — honest numbers, not a hidden effect.

In vanilla survival, if you never put a hand basket (or other bag) in a bag slot, you might not have that main backpack grid at all — the left of the E window can be empty of slots. The game is what creates that grid, not this mod. Until you have a real backpack with at least one slot, this mod has nothing to measure, so it does nothing to your speed (or clears any effect it had). That is not a bug in the mod; it is how the base game and this mod’s rule fit together.

License / use
Free to use, copy, modify, and redistribute this mod and derived works for any purpose (including commercial packs), provided you credit the original author (Squidbat) in your readme, ModDB page, or in-repo credits so others can find the upstream author for questions, debugging, or merge requests. Provide link to my profile. Same caveat as above regarding formal licenses if you need one.

Github Link: https://github.com/19HarryHaller27/Inventory-Move-Speed