Use the Magic Light Probes from Eugene B on your next project. Find this utility tool & more on the Unity Asset Store.
Unity] Use Magic Light Probes to automate Light Probe and reduce scene size!
I couldn't easily find a free automatic Light Probe generator package so here's an open-source one I just cooked up in an hour! : r/Unity3D
Engine Work: Global Illumination with Irradiance Probes
Magic Light Probes v 1.4.31: Quick Editing Demo
Magic Light Probes, Utilities Tools
Unity - Manual: Light Probes for moving objects
The Amazing Power of Light Probes in Unity, by Victor Manuel Campos Toledo
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自作ワールド「Twilight – 薄明」についての話(note版)|NON