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I'm trying to set up a material's "Emission Strength" so that it is controlled by an area light's "Power" value (for example, adjust the light's power, and the emission strength adjusts likewise) I'm experimenting with a "Single Property" driver type.

Does anyone know if this can be done with drivers? If so, what should the set-up look like?

Thank you.

Light Settings

Driver set-up attempt...

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2 Answers 2

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Right-click on source, "Copy as New Driver", then Right-click on target, "Paste Driver".

You can additionally edit the driver to switch to a scripted expression if you want to adjust the ratio or use a more advanced formula.

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I figured it out. Change Prop ID: to "Light", choose the controller light, then copy the data path of the light's "Power" to the driver's "Path:"

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