This paper explores the technical implementation and artistic advantages of (also known as Height Fog) within modern game engines like Unity and Unreal Engine .
In real-time rendering, simulating atmospheric depth is essential for creating a sense of scale and immersion. While standard global fog applies uniformly based on distance, introduces altitude-based density, simulating realistic low-lying mist, ground haze, and mountain-top clarity. This paper details the shader logic, performance optimizations, and artistic applications of height-based fog systems. 1. Introduction Download File Advanced Vertical Fog Height Fog ...
Simulates "God Rays" by allowing light to scatter through the fog particles. Calculates fog density by sampling the Depth Texture
Calculates fog density by sampling the Depth Texture to reconstruct world-space positions and applying a vertical gradient. This paper details the shader logic
Advanced Vertical Fog: A Technical and Artistic Implementation Paper
Allows different colors for the lower and upper fog layers to simulate sunrise/sunset lighting. 4. Performance Considerations