Level Design Assistant (Legacy)

Overview

Make your level design faster and easier with essential viewport tools:

• Live Preview: Real-time visualization of all placement and duplication actions
• Universal Support: Works with any static mesh, actor, or Blueprint class
• Full Undo/Redo: All actions are safely integrated with Unreal Engine’s undo history
• Editor-Only Overhead: Zero runtime footprint or game performance impact
• Array & Grid Duplication: Bulk duplicate with linear offsets or 2D/3D grids
• Spline Duplication: Follow curves with dynamic mesh alignment
• Transform & Move: Focus on targets, place around reference actors, randomize rotations
• Organization & Notes: Outliner auto-organization, bulk renaming, and interactive 3D notes

This documentation covers the free demo version. For advanced instancing (ISM), custom shortcuts, and the Material Creator, check out LD Assistant 2.

Note

All assets shown in tutorials are examples and not supplied with the plugin. I recommend disabling the plugin before building the game, for compatibility reasons.

Launch the LD Assistant

Open the plugin from the editor toolbar or window menu to access the level design tools.

Note

You MUST set the grid size to 10 for the plugin to work properly.

Duplication Tools

The Selection dropdown configures post-duplication behavior (Select new meshes, Select both, or Keep original).

Linear Duplicator:

1. Select source actor(s)
2. Enable preview
3. Set offset and quantity
4. Click “Duplicate”

Grid Creator:

1. Select source actor(s)
2. Enable preview
3. Set X/Y offset and counts
4. Click “Create Grid”

Spline Duplicator:

1. Select actor(s) and click Create Spline
2. Adjust spline points and set quantity
3. Toggle update rotation
4. Click “Duplicate”

Move & Focus Actor Tools

• Reference Actor: Pick a center actor (first chosen actor becomes reference).
  • Place Around: Select actors, configure radius, and click Place Around [Name].
  • Set Focus: Orient selected actors to look directly at the reference actor.

Outliner, Rename & Measurement Tools

• Outliner Organizer: Automatically groups level actors into clean folders (add BP_ prefix for unmapped actors).
  • Batch Rename: Bulk rename actors with auto-increment numbers.
  • Measure: Measure distance between two selected actors.
  • Statistics: Count lights and static mesh actor instances.

In-Level Notes System

Add & Manage 3D Level Notes:

1. Pick a reference actor and click Add new note to this actor (spawns a BP_Note child actor).
2. Enter note description, set display size, and click Update Note.
3. Change parent actors via Update Target Actor.
4. If notes scale or rotate unexpectedly when modifying parent meshes, click Refresh all notes.

Please do not edit a note outside of the LD Assistant plugin (such as in the BP Details panel directly).

Align Tool

Aligns actor pivots along X, Y, or Z based on the average center of your selection.

Distribute Tool

Distributes actors uniformly along X, Y, Z, or 3D axes between the first and last selected actor.

Rotation Tool

The rotation tool allows rotating actors locally with the defined amount. The random rotation will add random rotation depending on XYZ boolean values.