PCG Geometry Decals

Place high-fidelity geometry decals directly onto Unreal landscapes—automatically conforming, displacing, and blending into terrain with Nanite-ready results.

Perfect for photogrammetry workflows, stylized terrain detailing, and cinematic-quality environments.

Features

✅ Drag & Drop — add actors to your scene that auto-generate PCG-driven geometry on placement.

✅ Terrain-Conforming Geometry — decals snap to the underlying landscape.

✅ High-Resolution Displacement — sculpt layered surface detail using real heightmap-driven geometry.

✅ Full Artistic Control — customize material, displacement, falloff, radius, UVs, and resolution—directly from the Details panel.

✅ Nanite Baking — convert decals to optimized Nanite-ready static meshes for runtime use.

✅ Lightweight & Fast — async PCG means instant feedback and non-blocking edits.

✅ Ready-to-Use Examples — includes master material and preconfigured child blueprints for fast iteration.

Use Cases

Photoreal terrain stamping — add cliffs, soil, or gravel with full geometric depth.

Stylized environments — create layered terrain elements with clean artistic direction.

Lookdev and kitbashing — iterate terrain compositions quickly and visually.

Games and cinematics — add micro-terrain variation without touching the landscape material.

Quickstart

1. Make sure to go to Edit->Plugins and enable:

   • GeometryScripting

   • PCG

   • PCGGeometryScriptInterop

   • ModelingToolsEditorMode

2. Restart your project

3. Drag a BP_GeometryDecal_* actor from /Game/PCGGeometryDecals/Demo/Examples/ into your level (these are ready-made variants with materials and textures preassigned) -or- Subclass BP_GeometryDecal and assign your own material + height texture.

4. Adjust radius, height intensity, falloff, UV tiling, resolution, etc.

5. Select one or more decals and right-click → Scripted Actor Actions → Bake to Static Meshes.

6. Enable Nanite on the resulting mesh if needed in the popup window settings.

Additional information

Features

• Procedural decal placement

• Editor‑time terrain-conforming geometry

• Heightmap-driven displacement with accurate normals

• Async PCG workflows for instant feedback

• Nanite baking to optimize runtime meshes

• Full customization through master and child blueprint system

Blueprints Included

• BP_GeometryDecal (abstract base actor)

• Example Decals: 7

• PCG graph assets: 7

• Editor Utility: 1 (for bake-to-mesh actor right-click functionality)

   

Materials & Textures

• Master Materials:

  • M_GeometryDecal_Master

  • M_GeometryDecal_Basic, M_GeometryDecal_Height

• Instance Materials matching each example decal

• ARM/BC/D/N textures for each decal (4 maps per decal type)

• Utility Textures: 2

   

Sample Map & HLOD Layer

• Demo Map: PCGGeometryDecals_Demo

   

Blueprint vs. C++

• Entirely Blueprint-driven: no custom C++ classes (all geometry logic via PCG and dynamic mesh actors)

   

Dependencies

• Unreal Engine 5.5+ (requires PCG and Nanite support)

• Plugins to enable: ModelingToolsEditorMode, GeometryScripting, PCGGeometryScriptInterop, PCG