How To Use SSGI in Unity HDRP for Dynamic Global Illumination (Unity Guide 2024)

In this video, i will show you how to set up SSGI in Unity HDRP the correct way to get the BEST results of indirect lighting simulations. I will also show you how to solve the off-screen issue by using reflection probes. This video uses real time reflection probe with time slicing feature enabled (only exist in latest version, that is Unity 2022 LTS or above).

Recent hype in unreal engine 5 lumen system makes it seems like unity does not have any solution whatsoever to compete in simulating indirect diffuse lighting, therefore in this video i will show you one of the methods to achieve similar lighting by using Screen Space Global Illumination (SSGI). Usually SSGI is best used in outdoor scenes and not indoor scenes where light are hard to come inside the camera frustrum. Unlike Adaptive Probe Volume (APV), SSGI does not need you to do any baking.

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Github Project: https://github.com/Invelord/courtyard

Timestamps:
00:00 Github Project
00:29 Install HDRP Package
01:27 Creating a Global Volume
02:22 Set-Up SSGI
04:29 Reflection Probe Fallback
05:45 Final Result
05:55 Ending

Music Used:
Brandenburg Concerto No4-1 BWV1049 - Classical Whimsical - Kevin MacLeod

Karl Casey @ White Bat Audio - Dystopian Dark Synthwave Mix - Alone