Overview#

Inmis is a storage mod built around one idea: a chest you can carry. It adds nine backpack tiers plus an ender pouch, all crafted from ordinary materials and upgraded step by step.

A backpack is opened by right-clicking it in your hand, or with a key bind, and it can be worn in the chest armour slot so it sits on your character's back while still being openable. Upgrading a backpack never destroys what is inside — the contents move to the new tier — and every backpack keeps its items across world reloads.

Nothing about the mod is hidden behind progression gates: the smallest tier costs a few pieces of leather, and each step up simply asks for a better material.

Backpack tiers#

Tier	Slots	Notes
Baby Backpack	3	The starter pouch, made from leather and a chest
Frayed Backpack	9	Dyeable — colour it like leather armour
Plated Backpack	18	Reinforced with iron
Gilded Backpack	27	Gold-trimmed, same size as a single chest
Bejeweled Backpack	36	Diamond-studded
Blazing Backpack	45	Fireproof — survives lava
Withered Backpack	54	Wither-touched, a double chest on your back
Endless Backpack	108	The largest tier, several chests in one item
Ender Pouch	—	Opens your ender chest from anywhere

Slot counts come from the config file and can be changed, so a server can make the tiers larger or smaller to taste.

Crafting and upgrading#

The first backpack is crafted from leather around a chest:

 [L]
[L][C][L]
 [L]

Each later tier is the previous backpack surrounded by that tier's material — iron for plated, gold for gilded, diamond for bejeweled, blaze rods for blazing, and so on. The recipe book lists the exact pattern for every tier once you have the ingredients.

Upgrading keeps your items. When a filled backpack is used in an upgrade recipe, everything inside is copied into the new one, so you never have to empty a backpack before improving it.

Opening and wearing#

There are three ways to open a backpack:

Right-click it while holding it.
Press the key bind (default B), which opens the first backpack it finds on you — including one worn in the armour slot.
Right-click the ender pouch to open your ender chest instead.

A backpack can be placed in the chest armour slot. Worn like that it renders on your character's back for everyone to see, and it still opens with the key bind, so you get storage without giving up a hand or a hotbar slot. Whether backpacks may go in the chest slot at all is a config option.

Configuration#

The config file lives in your config folder and can also be edited in-game from the mod list.

Option	Default	What it does
`backpacks`	nine tiers	Name, row width, row count, fireproof flag, dye flag and open sound per tier
`allowBackpacksInChestplate`	true	Lets backpacks be worn in the chest armour slot
`requireArmorTrinketToOpen`	false	When on, a backpack must be worn before it can be opened
`playSound`	true	Plays a sound when a backpack is opened
`unstackablesOnly`	false	Restricts backpacks to items that do not stack
`disableShulkers`	false	Blocks shulker boxes from being stored
`blacklist`	empty	Item IDs that may never be put in a backpack
`spillMainBackpacksOnDeath`	true	Empties inventory backpacks on death instead of dropping them full
`spillArmorBackpacksOnDeath`	false	Same, for a worn backpack
`guiTitleColor`	`0x404040`	Colour of the title text in the backpack screen

Changing a tier's row width or row count resizes that backpack; existing items are kept as long as the new size is not smaller.

Multiplayer and worlds#

Backpack contents are stored on the item itself, so they travel with the item: drop it, put it in a chest, or hand it to another player and the storage goes with it.

On a server the mod must be installed on both sides — the server owns the backpack inventory and the client draws the screen and the backpack on your back. Config values that affect gameplay, such as tier sizes and the blacklist, are read from the server's config file.

On death, inventory backpacks spill their contents by default so nothing is lost inside an item that might despawn; a worn backpack keeps its contents unless you turn that option on too.

Tips#

Dye a frayed backpack to colour-code your storage — one colour for ores, another for building blocks.
The blazing tier is the safest choice for nether trips because it does not burn up if you drop it.
Wearing a backpack in the chest slot and using the key bind is the fastest workflow while mining: no hotbar slot spent, one key to open.
An ender pouch pairs well with a big backpack: bulk goods in the pack, valuables in the ender chest.
If a server feels the tiers are too generous, shrink them in the config rather than removing the mod — the recipes stay the same.