4.19 Physical Lights

[pf_breton (Pierre-Felix Breton)]

I think I see what you’re saying. I could go outside on a cloudy day with an incident light meter and measure maybe 1,000 lux facing straight up, then capture an HDR panorama of the sky. Back in Unreal the HDR panorama will be normalized and I could plug in my measured 1,000 lux. Right? It’s not a bad idea as long as there’s still a way to get a sunny and non-sunny texture to use the same scale if I wanted (they would output/measure different results in lux obviously).

This exactly the way this solution could work.