Lumina incorporates the complete range of features found in Relight, including the Shadow Strength Adjuster and additional functionalities. I encourage you to transfer and explore Lumina for yourself.
You can access Lumina on the Steam Workshop website using the following link: Lumina https://steamcommunity.com/sharedfiles/filedetails/?id=2983036781

Furthermore, if you specifically need direct shadow adjustment capabilities, you can make use of Eyecandy X, which complements Lumina.
For more information on Eyecandy X, please visit the Steam Community page: Eyecandy X https://steamcommunity.com/sharedfiles/filedetails/?id=2980339529