Agentic Biomes

PCG biome generation for Unreal Engine 5.8, built on Epic's BiomeCore, for Landscape and MeshTerrain. Define a biome once as a data asset — species rows, weights, priorities, ground cover — place it by volume, painted biome map, or closed spline, and build. One biome asset drives either terrain backend.

Engine capture with graphic overlays. Third-party scenery shown in the image is not included; its credits are printed on the image. The setup guides are text walkthroughs, not editor UI screenshots.

Key Features

• Biome Data Assets — A UAgenticBiome lists offline species rows for trees, rocks, and props, runtime entries for GPU ground cover, and the landscape layer the biome binds to.
• Three Placement Modes — Grid (the sector grid is the boundary), BiomeMap (a painted colour texture is the authority), and Hybrid, plus box volume regions from Build Biome Volumes and closed-spline regions.
• Landscape and MeshTerrain — The Terraformer resolves the backend from the level (Terrain Backend: Auto, Landscape, or MeshTerrain). One biome asset serves both; rows can be limited to one backend, and validation names a row that uses a filter its backend does not support.
• Runtime GPU Ground Cover — RT_* runtime templates run GPU generator graphs that scatter grass, plants, and stones around the camera at runtime. Twelve showcase templates ship, six per backend. The GroundScatterGPU_R2_* generators add density filtering, Voronoi patches, spatial density noise, species territories, and landscape-layer gating for templates of your own.
• Layer-Stack Terrain Material — M_AT_LayerStack with a ready instance for Landscape, one for MeshTerrain, and one for painted biome layers: a noise band, painted layers, and a slope-driven cliff. Runtime Virtual Texture reading and Nanite displacement are switches, off in the shipped instances. Eight Quixel Megascans surface sets are included.
• Roads and Exclusion Zones — A road component on a spline with optional Landscape deformation and layer paint, and a Terraform Excluder (box or spline) that the shipped Landscape sampler graphs read; it has no effect on MeshTerrain levels.
• Wind Bridge — A level actor that fans one wind value to your own material parameter collections and to wind-receiver actors, including a base class for wind-driven Niagara actors. Nothing is pre-filled; you point it at your own setup.
• Six PCG Nodes — BiomeSamplingDomain, CliffHeight, CliffPlace, CurvatureFilter, FogPlacement, and HeightGradient.
• Agent Authoring — 28 editor tools in two toolsets, registered with Epic's ToolsetRegistry, so an MCP client can inspect, edit, place, build, and verify biomes.

Getting Started

• Quick Start Guide — Enable the plugins, open a showcase level, then set up your own level

Guides

• Biome Assets — Definition, species rows, runtime entries, and validation
• Placement — Grid, biome map, volumes, splines, exclusions, and roads
• Runtime Ground Cover — GPU generators, runtime templates, and tuning
• Terrain Material — The layer-stack master and its per-backend instances
• Agent Toolsets — Drive the plugin from an MCP client
• Wind Bridge — Connect your own wind to foliage materials and Niagara

Reference

• Terraformer — The Terraformer, sectors, regions, excluders, and the road component
• Biome Asset — Every authored field of a biome asset
• PCG Nodes — The six custom nodes, pins, and settings
• Console Variables — Console variables and commands the plugin registers
• Toolsets — Every callable tool and its arguments

Help

• Troubleshooting — Empty builds, missing ground cover, wind that does not move, and toolsets that do not appear
• Changelog — Release notes
• Discord Support

Requirements

Agentic Biomes enables its required plugins through its descriptor. Everything the showcase levels use ships in the plugin: biomes, sample meshes, runtime templates, and the terrain material's surface textures. No other marketplace pack is required.

The AgenticBiomes module is Runtime; AgenticBiomesEditor and AgenticBiomesToolsets are Editor-only. Agent tooling is not a runtime game dependency.

Architecture

Terraformer (one per level)
├── Placement: Grid sectors · painted biome map · volume regions · spline regions
└── Biome data asset (per region)
    ├── Offline species rows  → trees, rocks, props generated into the level
    └── Runtime entries       → GPU ground cover generated around the camera

Terrain backend (Auto, Landscape, or MeshTerrain)
  → BiomeCore (Epic's PCG biome framework)
      ├── Region cache  → where each biome is
      └── Generators    → what each biome places

A placement rule decides where a biome is; the biome asset decides what grows there; BiomeCore does the generation. The terrain material is separate: biomes bind to a landscape layer by name, and the layer-stack material paints that layer.