Agentic Atmos

Native sky, authored day cycles, and weather for Unreal Engine 5.8. Place one sky actor, assign a day cycle, and build a consistent atmosphere from reusable look presets. Work in Unreal's Details panels or through the editor-only agent toolsets.

Rendered with the plugin's showcase level, with graphic overlays. Demonstration scenery is not all included. The setup guides are text walkthroughs, not editor UI screenshots.

Key Features

• One Sky Owner — Sun, moon, skylight, sky atmosphere, height fog, volumetric clouds, sky dome, and post-process components on one actor.
• Authored Day Cycles — Timed slots select reusable look presets; per-category modifiers hold the settings. Default, RealSky, and Woodland cycles ship with six slots each.
• Layered Weather — Fourteen weather type assets, a weather look layer, rain with surface-impact effects, falling snow, and surface-weather material support.
• Terrain-Relative Ground Fog — Placed banks follow a baked terrain height map. Renderer and material assets plus three library looks are included.
• Shared Wind — One resolved wind published to materials, the engine wind source, Niagara, and Blueprint.
• Agent Authoring — Nine editor toolsets for time, sky inspection, capture, weather, content, day-cycle slots, regions, validation, and reference comparison.

Getting Started

• Quick Start Guide — Install the plugin, place one sky actor, and inspect the supplied cycle

Guides

• Day Cycles — Slots, presets, modifiers, and transitions
• Weather — Weather types, severity, effects, and the weather look layer
• Ground Fog — Placed banks, terrain baking, and look controls
• Exposure — Camera response, metering, and the grade
• Wind for Your Content — Connect foliage, materials, cloth, and Niagara to resolved wind
• Agent Toolsets — Discover tools and iterate on a reference with an MCP agent

Reference

• Sky Actor — Owned components, properties, and refresh
• Look Presets — Modifier slots and precedence
• Day Cycle Asset — Cycle fields, slot fields, and coverage
• Console Commands — Clock and diagnostic commands
• Toolsets — Every callable tool and its purpose

Help

• Troubleshooting — Competing sky producers, stale fog bakes, missing content, and exposure
• Discord Support

Requirements

The AgenticAtmosphere module is Runtime; AgenticAtmosphereToolsets is Editor-only. Agent tooling is not a runtime game dependency.

Architecture

AAtmosSkyActor
├── Sun + Moon + SkyLight
├── SkyAtmosphere + HeightFog + VolumetricCloud
├── SkyDome + PostProcess
└── Day cycle
    └── Timed slots
        └── Look presets
            └── Per-category modifiers

One clock + selected day cycle
  → Resolver
      ├── Actor default layer
      ├── Day look (selected / blended slots)
      └── Weather look layer
  → Composed state
  → Sky actor's owned components

Slots determine when and which preset. Presets own authored values; the resolver composes those values into the runtime result. Ground-fog banks need separate placement and terrain baking—assigning a day cycle alone does not create them.