Project EMapper is an in-game helper for ProjectE that makes it easy to find items that are missing EMC (or already have EMC), set custom EMC values via a simple UI, save them directly into ProjectE’s custom_emc.json, and then reload datapacks so ProjectE picks up the changes—without needing to type commands.

Features

scan Items and Browse:
- Missing EMC Value
- Has EMC Value
- All Items
Clickable List Ui with Items Icons
Edit EMC value for selected item stage them locally when done you can push changes and adds to config
Reload from GUI

Requirements

Minecraft 1.21.1
Neoforge 21.1.215
projecte - ProjectE-1.21.1-PE1.1.0 or newer, may work on older versions have not tested

How to use

defult Keybind to open UI is k, remapable

Set or change an EMC value

Click an item in the list
Type a number into EMC value
Click Apply (local) to stage the value

Staging lets you set a bunch of values first, then save once.

Reload ProjectE values

Click Reload ProjectE

This triggers an internal /reload, which makes ProjectE rebuild its mapping with your new values.

Troubleshooting

“My EMC changes didn’t apply.”

Make sure you clicked Save to custom_emc.json

Then click Reload ProjectE

Confirm the item exists in config/ProjectE/custom_emc.json

“I see items like air/bedrock in the list.”

Some registries include special or non-survival items. You can ignore them, or filter them out in a future update.

Planned Improvements

Search bar + sorting

Show current EMC and custom override side-by-side

Optional “hide non-survival / technical items”

Server/OP mode with permission checks