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Measuring Illuminance in UE4

Hello,

I’m working on simulating indoor room environment. I have tried to make Blue Print by using to measure illuminance (Lux) in the environment in specific spot but it doesn’t work. Does anyone have experince on doing something like this. Please give me advice.

Thank you

Use the Show>Visualize>HDR (Eye Adaptation) option for the 3D view.

Thanks for helping but where is it in the game. btw, I’m using version 4.12.5

It’s in the editor viewport settings.