InstanceMaster is a tool for automatically detecting and merging repeating meshes in Blender into clean instanced groups.

It analyzes real geometry, topology, and affine similarity to identify duplicates, even when:

- duplicated manually, via Array, Mirror, or Geometry Nodes

- scaled or rotated differently

- transforms are applied or not

- vertex order differs

- mesh names differ

Designed to optimize scenes before export to Unreal Engine.

- Detects identical structure and shape

- Merges objects into instanced meshes

- Optionally compares materials

- Preserves real-world scale

- Creates new groups only when geometry actually differs

- Safe for large scenes thanks to batching and progress bar

✓ Modal Apply Modifiers — Blender stays responsive

✓ Progress bar for all operations

✓ Built-in GLB export (single file)

✓ Simplified workflow in one panel

1) Set Origin — stabilizes object origins.

2) Apply Modifiers — batch application every 20 mods.

3) Run Instancing — generates instanced groups.

4) Apply Mesh to Groups — resyncs if needed.

5) Export GLB — exports to a single .glb.

Use Import → Import To Level.

Instances are preserved; convert to ISM/HISM if needed.

1. Download InstanceMaster.zip

2. Blender → Preferences → Add-ons → Install

3. Enable addon

Panel: Sidebar → InstanceMaster