PG HDRi's

[kmwhitt]

Hello everyone.  I have started using HDRi maps for environmental lighting with Corona.  I have most of the Peter Guthrie maps and have used them often with Vray for C4D.  I am noticing that an intensity of 1 is far too much for my interior scenes as everything quickly becomes burned out.  I could use them with Vray at 1:1 with no problem.  Any suggestion for finding a reasonable emission intensity for use with Corona?  I would imagine others have used these same HDRi's successfully and may be able to give me some pointers.  Thanks,  Kevin

[iacdxb]

Hi,
No idea which which version you are using, new updated version 1.1 are more polished.

try exposure -4 or -6.... depends, it will work fine.

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[kmwhitt]

hi iacdxb - thanks for the reply.  I am using the latest build.  Is it recommended that you lower the exposure value or the emission intensity?  I'll give your settings a try.  Thanks again!

[RED LAB]

Hi, you just have to put the HDRI in the diffuse layer. Not in a light material.
Then i usually lower the exposure between -5 to -1 depends of the HDRI.

[iacdxb]

it was in diffuse. you can give try in other channels.
Yes, and reduce exposure.

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[kmwhitt]

I thought the new way was to use a light material as per this video:

When I do it is way overexposed.  Peter Guthrie's maps all the only ones that behave this way (at least of the maps I own).

I guess what I'm asking is there a way to calibrate the HDRi so that I know I am getting accurate output from the map.  Sure I a can turn it up or down, but is it physically correct?

[iacdxb]

See this... may be helpful.

http://www.peterguthrie.net/blog/2016/2/updated-pg-skies

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