Since my speed level design videos using Unity, I got asked to do a tutorial on lighting, so here it is! We’ll gonna learn how to add realistic lighting using HDRP in Unity 2019.3. Will you enjoy? YES you will.

All content on Sykoo is available for free. We as a community support the cause of making education available for everyone. Any support is appreciated for us to keep making content for free.

Global illumination, or ‘GI’, is a term used to describe a range of techniques and mathematical models which attempt to simulate the complex behaviour of light as it bounces and interacts with the world. Simulating global illumination accurately is challenging and can be computationally expensive. Because of this, games use a range of approaches to handle these calculations beforehand, rather than during gameplay.

In this document we will give you an overview of how GI works in Unity. We will walk you through the different lighting techniques available, explain how to setup your project for lighting and then explore the various tools at your disposal when considering how to light a scene.