Unreal Engine 5.5 Light Function Tutorial | Custom Cloud Shadow System

Published: 11 March 2026
on channel: Arghanion's Puzzlebox

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In this Unreal Engine 5.5 tutorial, we’ll build a top-down shadow system and cloud shadow setup for your environment using a Light Function Material.

You’ll learn how to create the shader, set up useful parameters, control the movement and scale of the effect, and turn it into a highly customizable system you can reuse across different scenes. This is a great way to add atmosphere, variation, and extra motion to landscapes, forests, stylized worlds, or large outdoor environments.

We’ll cover how the material works, how to expose controls for quick art direction, and how to build a flexible effect that can be adjusted for subtle cloud coverage or stronger stylized shadow patterns.

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00:00 Intro
01:53 Basic Setup
11:25 Shader Refinement
20:50 Cloud Shadow Setup
27:54 Outro

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