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Setting up a 3 point light scenario

Contributor ,
Jul 08, 2021 Jul 08, 2021

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Can someone help me understand how to set up a simple 3 light scenario?

I am using area lights for key fill and back(hair)

I am having a hard time interperting Exposure vs Intensity

 

Let's say I want a key light at 100% and Fill light at 50% for a 2:1 lighting ratio

Do I set both area lights to the same Exposure and then adjust the Intensity values?

 

Thanks

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Adobe Employee ,
Jul 09, 2021 Jul 09, 2021

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Yes, the exposure is an exponential intensity parameter, allowing you to have very faint lights and very bright ones like a sun. The intensity is a multiplier on that exposure.

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Contributor ,
Jul 09, 2021 Jul 09, 2021

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Thanks for getting back to me and the explanation...However, I still don't have an answer to my question. ty

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Community Expert ,
Jul 27, 2021 Jul 27, 2021

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If I understand right you query is "how to create 3 point light" as we can do in Dn by adding "3 point light" into scene. 

You can add any 3 seperate points or spots, etc... lights and locate them behind in front of your object. 

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Contributor ,
Jul 27, 2021 Jul 27, 2021

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Thanks for the input...Actually I was trying to figure out the correct settings for fill, key, and back lights ...I finally just adjusted them until they look appropriate and move on....For what's worth... I downloaded a free 3d model of the studio light, added a Stager spot inside it, adding a null object so the pivot point was correct and now I can use the group light like a studio light aiming, adding flags, barn doors, outer light angle and fall-off.

 

let me know if you want more info...ty

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Adobe Employee ,
Jul 19, 2021 Jul 19, 2021

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Exposure is an exponential value so for a 'ratio' I would use the same exposure and just adjust intensity.
Keylight at exposure 1, intensity 100%
Fill light at exposure 1, intensity 50%

You can technically do it with EV too, but it's a little harder to figure out the ratios, since EV is exponential.

Senior Product Manager, 3D & Immersive

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