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ue-uds-fog-and-atmosphere

Configure fog, volumetric fog, dust, and atmospheric scattering in Ultra Dynamic Sky.

55|5|Updated Mar 26, 2026
Search Tags:#atmosphere#unreal engine#game environment#ultra dynamic sky#volumetric fog#sky atmosphere#fog density
One-click install
npx skills add https://github.com/kevinpbuckley/unreal-engine-skills --skill ue-uds-fog-and-atmosphere-kevinpbuckley
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: ue-uds-fog-and-atmosphere
Source: https://github.com/kevinpbuckley/unreal-engine-skills/tree/main/skills/ultra-dynamic-sky/ue-uds-fog-and-atmosphere
Command: npx skills add https://github.com/kevinpbuckley/unreal-engine-skills --skill ue-uds-fog-and-atmosphere-kevinpbuckley

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Tuning fog and atmosphere in Ultra Dynamic Sky involves many interacting categories — Fog Density, Fog Color, Volumetric Fog, Dust, Sky Atmosphere, and Simplified Color — and misconfiguration causes issues like hard fog lines, black sky flickering, or settings that silently have no effect. This Skill maps each system, its cost, and its interactions so changes produce the intended visual result. ## Core Features & Use Cases - Fog Density and Color Control: Derive height fog density, falloff, and start distance from Cloud Coverage, Fog, and Dust Amount, and understand when the Sky Atmosphere overrides Fog Color settings. - Volumetric Fog and Global Volumetric Material: Enable volumetric fog with light scattering, add 3D noise extinction, ground fog, and underwater extinction, while managing the performance cost. - Sky Coloring Modes: Choose between Sky Atmosphere (Rayleigh scattering, sunset absorption, overcast luminance) and the cheaper Simplified Color LUT-based mode. - Use Case: A user reports a hard line where fog suddenly starts. The Skill identifies that UDS is positioned so the camera drops below the sky atmosphere ground, and directs placing UDS at ground level or lowering the Sky Atmosphere component. ## Quick Start Ask the agent to enable volumetric fog in Ultra Dynamic Sky with ground fog and tune the sunset colors using the Sky Atmosphere category.

Frequently Asked Questions about ue-uds-fog-and-atmosphere

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I enable volumetric fog in Ultra Dynamic Sky?▼

Enable it from the Volumetric Fog category on UDS, then tune overall extinction, render distance, and the Volumetric Scattering Intensity for the sun and moon. Note that default Low and Medium engine scalability disables volumetric fog entirely, since its scalability cvars live in the Shadow Quality group.

Why do my Fog Color changes have no effect in UDS?▼

The project setting Support Sky Atmosphere Affecting Height Fog is enabled, so height fog colors come directly from the sky atmosphere and most Fog Color settings are ignored. Either disable that project setting or switch Color Mode to Simplified Color to regain direct control.

Sky Atmosphere vs Simplified Color in Ultra Dynamic Sky?▼

Sky Atmosphere is the default Color Mode and provides realistic scattering with per-time-band Rayleigh settings and sunset absorption control. Simplified Color is cheaper at the material level, uses LUT textures, and offers more directly tweakable color values.

Why is there a hard line where fog suddenly starts?▼

The sky atmosphere position is wrong relative to the scene, meaning the camera drops significantly below the UDS actor. Place UDS at ground level, or select the Sky Atmosphere component on UDS and move it below the lowest point the camera can reach.

Why is Dust Amount ignored on UDS?▼

When Ultra Dynamic Weather is in the scene, UDW takes control of Dust Amount as part of its weather state. Adjust dust through UDW's weather state instead of setting it directly on UDS.

Why does the ground fog feature have no effect?▼

Ground fog in the Global Volumetric Material requires the project setting that generates mesh distance fields. Enable mesh distance field generation in the project settings for the ground fog extinction to render.

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