Notloc's Inventory Tetris mod is a complete overhaul to the game's inventory system - and while it uses a formula to generate the parameters of external modded items on the fly, the results may not always work as intended.

This guide will briefly teach you how to make custom configuration patches, being able to edit an item's:

• Grid size: How big an item is in the tetris inventory.
  
• Stack size: How many copies of the same item can be merged.
  
• Container size: The size of a grid inside a container.

In order to access Inventory Tetris' editor, you can either use DETOX's Inventory Tetris - Edit Container Size mod, or enable debug mode.

You can enable debug the mode simply by accessing Project Zomboid's properties on Steam, and adding the line "-debug" to the launch options.

When right clicking an object in game, an option labelled "Edit Item Data" will appear. Clicking it opens a popup where you can set the stack size (1 for non stackables; recommended for containers and anything with a condition bar / food). Below is the item with its grid size. Clicking and dragging the white square allows you to stretch the item to the desired size. Once done just click the "OK" button to apply.

Much alike, containers are edited by right-clicking the item while their storage is open, this will replace the "Edit Item Data" button with "Edit Container Data".



From here you can change:

• The size and distribution of the container's grid / sub-grids.
  Sub-grids can be utilized to limit the max size of items that can be put in a container, as well as compartmentalize and organize the storage. Be wary that each sub-grid must be searched separately if "Container Searching" is enabled in the mod's settings.
  
  
  
• What type of items are allowed in a container.
  The container will reject items pertaining the ticked category even if they fit in size and weight. An use case for this would be to imitate relative space; for example it wouldn't make sense to fit a crowbar inside a seed bag, but if seeds take 1x1 it also wouldn't make sense to only be able to fit 3 types of seed within the space of the crowbar, so instead you can make the container larger and restrict all item types that aren't seeds.
  
  
  
• Whether the container inherits the "Organized" trait.
  When a container is organized, when using quick move items will always stack when possible or otherwise take the first available slot of the grid.

When you have finished editing the item, click the "Accept" button and move on to the next.

Once you're done editing all the items you want to be included by your mod, open the menu to edit a container's data again, but this time press on the "Export" button. Doing so will create a "TetrisDataPack.lua" file under:
And that's it! This is the resulting script file you'll want to include in your mod's media folder, placed under:
Please be mindful to rename this file something unique so that it does not overwrite other exports. For example you may append your mod's name or the target mod ID to it such as "TetrisDataPack_modid.lua".

To flush out your current edits from your cache, simply delete the "InventoryTetris_ContainerData.json" and "InventoryTetris_ItemData.json" files from the LUA folder.