PCG Geometry Decals

Description

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.

[Showcase Video] | [Documentation] | [Join the Discord]

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.

This blueprint is Editor-only.

To ship in-game, bake all decals to Nanite static meshes.

Credits

Demo content includes textures from PolyHaven (CC0 license).

Please consider supporting them on Patreon.

Technical Details

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

  PCG Geometry Decals UE 5.6 - 5.7

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