If you’ve ever wanted to create your own studio HDRIs instead of relying on downloaded ones, this tutorial will show you how. You’ll learn how to build a fully procedural studio HDRI in Blender using simple geometry and emission materials, making it easy to create anything from classic three-point lighting to more complex indoor or even outdoor lighting environments. The final HDRI can be rendered and used in any 3D application that supports HDRI lighting.
Text version: https://hdrmaps.com/blog/how-to-create-your-own-hdri-in-blender/