Combat Zones for RMU

Combat Zones for RMU is a lightweight visualisation module for the Rolemaster Unified (RMU) system. It automatically renders a token's combat zone, its combat facings (Front, Flank, Rear) and weapon reach arcs directly on the canvas, helping GMs and players make tactical decisions at a glance.

Features

• Dynamic Combat Zones: Automatically draws the Front (Green), Flanks (Yellow), and Rear (Red) zones based on the character's facing and size.
• Facing Arrow: An arrow outside the combat zone shows the current facing of the token.
• Token Rotation: The facing arrow also acts as a draggable area allowing you to rotate a selected token you own.
• Weapon Reach Rings: Visualizes the threat range of all natural weapons, equipped melee weapons and shields. If reach is affected by talents or other effects automated by the system, then these are included.
• 3D Threat Ruler (Elevation Support): Accurately visualises true 3D distance when tokens are at different elevations. Select your token(s) and hover over a target to generate a dynamic, bi-directional line that automatically calculates whether your weapons can physically reach the target's combat zone.
• Metric & Imperial Support: Works out of the box with standard feet. Automatically detects metric scenes and applies a configurable conversion factor (default 3.33) to ensure reach rings match the grid correctly.
• Live Updates: Zones update instantly when:
  • Tokens rotate or move.
  • Weapons are equipped or unequipped.
  • Items are modified in the character sheet.

Settings

There are game settings to customise the look of the combat zone and weapon reach rings.

• Show All Reach Rings: If enabled, all reach rings are always visible for all tokens.
• Custom Colours: Don't like the default Green/Yellow/Red? You can change the colour of the Front, Flank, Rear, and Spoke lines and the front-facing arrow independently using a colour picker.
• Opacity Control: Adjust the transparency of the zone fills. Set it to 0.0 for no fill, or crank it up for high-contrast visibility on dark maps.
• Metres-to-Feet Multiplier: For groups using metric grids, you can tweak the conversion math (Default: 1.5m = 5ft) to match your table's house rules.
• Show Reach Labels: If enabled, weapon names will be displayed horizontally on their corresponding reach rings.
• Enable 3D Threat Ruler: If enabled, hovering over a target while controlling a token will draw a dynamic line showing true 3D reach and hit/miss chevrons.

How to Use

Toggling Visibility

The module adds a toggle button to the Token Controls layer (the "person" icon on the left sidebar).

1. Select the Token Controls layer.
2. Click the "Toggle Combat Zones" tool (the circle-dot icon ◉).
3. This instantly shows or hides combat zones for all tokens on the canvas.
4. Select or hover over any token to see its weapon reach rings. (Note: Your own character's reach is always visible).

Using the 3D Threat Ruler

The 3D Threat Ruler must be enabled in the Game Settings.

To quickly check distances and elevation modifiers during combat:

1. Select one or more of your controlled tokens.
2. Hover your mouse cursor over an enemy token.
3. A threat line will render underneath the token art, bridging the gap between the combatants.
4. Equipped weapons will display as chevrons along the line. If a weapon's reach successfully intersects the target's combat zone in 3D space, the chevron will illuminate in your relative facing colour.

Important note on visibility

• For combat zones to only be seen by players if they are in their visual range, the scene must have token vision enabled (light tab), and the players' tokens must also have their vision enabled (vision tab).

Installation

1. In Foundry VTT, go to the Add-on Modules tab.
2. Click Install Module.
3. Search for "Combat Zones for RMU" or paste the manifest URL: https://github.com/Filroden/rmu-combat-zones/releases/latest/download/module.json

Compatibility

• Foundry VTT: Version 13+ is required.
• System: Designed for Rolemaster Unified (RMU).

License

This module is licensed under the MIT License.

Disclaimer and IP Notice

The Combat Zones for RMU module is an unofficial, community-developed tool designed to enhance the Rolemaster Unified experience on Foundry Virtual Tabletop.

This module is completely independent and is not affiliated with, endorsed, sponsored, or approved by Iron Crown Enterprises (ICE). "Rolemaster", "Rolemaster Unified", and the "RMU" acronym are trademarks of Iron Crown Enterprises.

This project does not distribute any proprietary text, artwork, or core rulebook content belonging to ICE. It functions strictly as a mechanical, workflow, and user interface enhancement for the official RMU system on Foundry VTT. Any use of specific system terminology or mechanical values is for functional compatibility purposes only.